M29W320EB70N6F ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash MemoryAbsolute Maximum Ratings . . . . . . . 21DC and AC PARAMETERS . 22Table 9. Operating and ..
M29W320EB-70N6F ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash MemoryLogic Diagram . . 5Table 1. Signal Names . . 5Figure 3. TSOP Connections . . . ..
M29W320EB70ZE6E ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash MemoryLogic Diagram . . 5Table 1. Signal Names . . 5Figure 3. TSOP Connections . . . ..
M29W320ET ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash MemoryM29W320ETM29W320EB32 Mbit (4Mb x8 or 2Mb x16, Boot Block)3V Supply Flash Memory
M29W320ET70N6 ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash Memoryfeatures an asymmetrical block archi-erations that are required to update the memorytecture. The M2 ..
M29W320ET-70N6 ,32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash MemoryFEATURES SUMMARY■ SUPPLY VOLTAGE Figure 1. Packages–V = 2.7V to 3.6V for Program, Erase CC and Rea ..
M50FW002K1 ,2 MBIT (256KB X8, BOOT BLOCK) 3V SUPPLY FIRMWARE HUB FLASH MEMORYfeatures an asymmetrical blocked ar-tile memory that can be read, erased and repro- chitecture. The ..
M50FW016N5 , 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
M50FW016N5 , 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
M50FW016N5G , 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
M50FW016N5G , 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
M50FW016N5G , 16 Mbit 2Mb x8, Uniform Block 3V Supply Firmware Hub Flash Memory
M29W320EB70N6F-M29W320EB-70N6F-M29W320ET70N6F-M29W320ET-70N6F
32 Mbit (4Mb x8 or 2Mb x16, Boot Block) 3V Supply Flash Memory
1/46March 2005
M29W320ET
M29W320EB32 Mbit (4Mb x8 or 2Mb x16, Boot Block)
3V Supply Flash Memory
FEATURES SUMMARY SUPPLY VOLTAGE
–VCC = 2.7V to 3.6V for Program, Erase
and Read
–VPP =12V for Fast Program (optional) ACCESS TIMES: 70, 90ns PROGRAMMING TIME 10µs per Byte/Word typical Double Word/ Quadruple Byte Program MEMORY BLOCKS Memory Array: 63 Main Blocks 8 Parameter Blocks (Top or Bottom
Location) ERASE SUSPEND and RESUME MODES Read and Program another Block during
Erase Suspend UNLOCK BYPASS PROGRAM COMMAND Faster Production/Batch Programming VPP/WP PIN for FAST PROGRAM and
WRITE PROTECT TEMPORARY BLOCK UNPROTECTION
MODE COMMON FLASH INTERFACE 64 bit Security Code EXTENDED MEMORY BLOCK Extra block used as security block or to
store additional information LOW POWER CONSUMPTION Standby and Automatic Standby 100,000 PROGRAM/ERASE CYCLES per
BLOCK ELECTRONIC SIGNATURE Manufacturer Code: 0020h Top Device Code M29W320ET: 2256h Bottom Device Code M29W320EB: 2257h
M29W320ET, M29W320EB
TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
SUMMARY DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5Figure 2. Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 3. TSOP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Figure 4. TFBGA48 Connections (Top view through package) . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 5. Block Addresses (x8). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Figure 6. Block Addresses (x16). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
SIGNAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10Address Inputs (A0-A20). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Data Inputs/Outputs (DQ0-DQ7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Data Inputs/Outputs (DQ8-DQ14). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Data Input/Output or Address Input (DQ15A–1).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Chip Enable (E). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Output Enable (G). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Write Enable (W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
VPP/Write Protect (VPP/WP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Reset/Block Temporary Unprotect (RP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Ready/Busy Output (RB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Byte/Word Organization Select (BYTE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
VCC Supply Voltage (2.7V to 3.6V).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
VSS Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
BUS OPERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Bus Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Bus Write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Output Disable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Automatic Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Special Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12Electronic Signature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Block Protect and Chip Unprotect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Table 2. Bus Operations, BYTE = VIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Table 3. Bus Operations, BYTE = VIH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
COMMAND INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Read/Reset Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Auto Select Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Read CFI Query Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Program Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3/46
M29W320ET, M29W320EB
Fast Program Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Quadruple Byte Program Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Double Word Program Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Unlock Bypass Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Unlock Bypass Program Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Unlock Bypass Reset Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Chip Erase Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Block Erase Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Erase Suspend Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Erase Resume Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Enter Extended Block Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Exit Extended Block Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Block Protect and Chip Unprotect Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17Table 4. Commands, 16-bit mode, BYTE = VIH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 5. Commands, 8-bit mode, BYTE = VIL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Table 6. Program, Erase Times and Program, Erase Endurance Cycles . . . . . . . . . . . . . . . . . . .18
STATUS REGISTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19Data Polling Bit (DQ7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Toggle Bit (DQ6).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Error Bit (DQ5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Erase Timer Bit (DQ3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Alternative Toggle Bit (DQ2).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Table 7. Status Register Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 7. Data Polling Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 8. Toggle Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21Table 8. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
DC and AC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22Table 9. Operating and AC Measurement Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 9. AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 10.AC Measurement Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Table 10. Device Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Table 11. DC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 11.Read Mode AC Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Table 12. Read AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 12.Write AC Waveforms, Write Enable Controlled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Table 13. Write AC Characteristics, Write Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Figure 13.Write AC Waveforms, Chip Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 14. Write AC Characteristics, Chip Enable Controlled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 14.Toggle and Alternative Toggle Bits Mechanism, Chip Enable Controlled . . . . . . . . . . . .27
Figure 15.Toggle and Alternative Toggle Bits Mechanism, Output Enable Controlled . . . . . . . . . .27
Table 15. Toggle and Alternative Toggle Bits AC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 16.Reset/Block Temporary Unprotect AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
M29W320ET, M29W320EBTable 16. Reset/Block Temporary Unprotect AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 17.Accelerated Program Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29Figure 18.TSOP48 Lead Plastic Thin Small Outline, 12x20 mm, Bottom View Package Outline. .29
Table 17. TSOP48 Lead Plastic Thin Small Outline, 12x20 mm, Package Mechanical Data . . . . .29
Figure 19.TFBGA48 6x8mm - 6x8 Ball Array, 0.8mm Pitch, Bottom View Package Outline. . . . . .30
Table 18. TFBGA48 6x8mm - 6x8 Ball Array, 0.8mm Pitch, Package Mechanical Data. . . . . . . . .30
PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31Table 19. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
APPENDIX A.BLOCK ADDRESSES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32Table 20. Top Boot Block Addresses, M29W320ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Table 21. Bottom Boot Block Addresses, M29W320EB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
APPENDIX B.COMMON FLASH INTERFACE (CFI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36Table 22. Query Structure Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Table 23. CFI Query Identification String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Table 24. CFI Query System Interface Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Table 25. Device Geometry Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Table 26. Primary Algorithm-Specific Extended Query Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Table 27. Security Code Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
APPENDIX C.EXTENDED MEMORY BLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Factory Locked Extended Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Customer Lockable Extended Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39Table 28. Extended Block Address and Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
APPENDIX D.BLOCK PROTECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Programmer Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
In-System Technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40Table 29. Programmer Technique Bus Operations, BYTE = VIH or VIL . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 20.Programmer Equipment Group Protect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Figure 21.Programmer Equipment Chip Unprotect Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Figure 22.In-System Equipment Group Protect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 23.In-System Equipment Chip Unprotect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45Table 30. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
5/46
M29W320ET, M29W320EB
SUMMARY DESCRIPTIONThe M29W320E is a 32 Mbit (4Mb x8 or 2Mb x16)
non-volatile memory that can be read, erased and
reprogrammed. These operations can be per-
formed using a single low voltage (2.7 to 3.6V)
supply. On power-up the memory defaults to its
Read mode.
The device features an asymmetrical block archi-
tecture. The M29W320E has an array of 8 param-
eter and 63 main blocks. M29W320ET locates the
Parameter Blocks at the top of the memory ad-
dress space while the M29W320EB locates the
Parameter Blocks starting from the bottom.
M29W320E has an extra 32 KWord (x16 mode) or
64 KByte (x8 mode) block, the Extended Block,
that can be accessed using a dedicated com-
mand. The Extended Block can be protected and
so is useful for storing security information. How-
ever the protection is irreversible, once protected
the protection cannot be undone.
Each block can be erased independently so it is
possible to preserve valid data while old data is
erased. The blocks can be protected to prevent
accidental Program or Erase commands from
modifying the memory. Program and Erase com-
mands are written to the Command Interface of
the memory. An on-chip Program/Erase Controller
simplifies the process of programming or erasing
the memory by taking care of all of the special op-
erations that are required to update the memory
contents. The end of a program or erase operation
can be detected and any error conditions identi-
fied. The command set required to control the
memory is consistent with JEDEC standards.
Chip Enable, Output Enable and Write Enable sig-
nals control the bus operation of the memory.
They allow simple connection to most micropro-
cessors, often without additional logic.
The memory is offered in TSOP48 (12x20mm), and
TFBGA48 (6x8mm, 0.8mm pitch) packages. The
memory is supplied with all the bits erased (set to
’1’).
Table 1. Signal Names
M29W320ET, M29W320EB
7/46
M29W320ET, M29W320EB
M29W320ET, M29W320EB
9/46
M29W320ET, M29W320EB
M29W320ET, M29W320EB
SIGNAL DESCRIPTIONS
See Figure 2., Logic Diagram, and Table
1., Signal Names, for a brief overview of the sig-
nals connected to this device.
Address Inputs (A0-A20). The Address Inputs
select the cells in the memory array to access dur-
ing Bus Read operations. During Bus Write opera-
tions they control the commands sent to the
Command Interface of the Program/Erase Con-
troller.
Data Inputs/Outputs (DQ0-DQ7). The Data I/O
outputs the data stored at the selected address
during a Bus Read operation. During Bus Write
operations they represent the commands sent to
the Command Interface of the Program/Erase
Controller.
Data Inputs/Outputs (DQ8-DQ14). The Data I/O
outputs the data stored at the selected address
during a Bus Read operation when BYTE is High,
VIH. When BYTE is Low, VIL, these pins are not
used and are high impedance. During Bus Write
operations the Command Register does not use
these bits. When reading the Status Register
these bits should be ignored.
Data Input/Output or Address Input (DQ15A–1).
When BYTE is High, VIH, this pin behaves as a
Data Input/Output pin (as DQ8-DQ14). When
BYTE is Low, VIL, this pin behaves as an address
pin; DQ15A–1 Low will select the LSB of the ad-
dressed Word, DQ15A–1 High will select the MSB.
Throughout the text consider references to the
Data Input/Output to include this pin when BYTE is
High and references to the Address Inputs to in-
clude this pin when BYTE is Low except when
stated explicitly otherwise.
Chip Enable (E). The Chip Enable, E, activates
the memory, allowing Bus Read and Bus Write op-
erations to be performed. When Chip Enable is
High, VIH, all other pins are ignored.
Output Enable (G). The Output Enable, G, con-
trols the Bus Read operation of the memory.
Write Enable (W). The Write Enable, W, controls
the Bus Write operation of the memory’s Com-
mand Interface.
VPP/Write Protect (VPP/WP). The VPP/Write
Protect pin provides two functions. The VPP func-
tion allows the memory to use an external high
voltage power supply to reduce the time required
for Program operations. This is achieved by by-
passing the unlock cycles and/or using the Double
Word or Quadruple Byte Program commands.
The Write Protect function provides a hardware
method of protecting the two outermost boot
blocks. When VPP/Write Protect is Low, VIL, the
memory protects the two outermost boot blocks;
Program and Erase operations in these blocks are
ignored while VPP/Write Protect is Low, even when
RP is at VID.
When VPP/Write Protect is High, VIH, the memory
reverts to the previous protection status of the two
outermost boot blocks. Program and Erase oper-
ations can now modify the data in these blocks un-
less the blocks are protected using Block
Protection.
When VPP/Write Protect is raised to VPP the mem-
ory automatically enters the Unlock Bypass mode.
When VPP/Write Protect returns to VIH or VIL nor-
mal operation resumes. During Unlock Bypass
Program operations the memory draws IPP from
the pin to supply the programming circuits. See the
description of the Unlock Bypass command in the
Command Interface section. The transitions from
VIH to VPP and from VPP to VIH must be slower
than tVHVPP, see Figure 17.
Never raise VPP/Write Protect to VPP from any
mode except Read mode, otherwise the memory
may be left in an indeterminate state.
The VPP/Write Protect pin must not be left floating
or unconnected or the device may become unreli-
able. A 0.1µF capacitor should be connected be-
tween the VPP/Write Protect pin and the VSS
Ground pin to decouple the current surges from
the power supply. The PCB track widths must be
sufficient to carry the currents required during
Unlock Bypass Program, IPP.
Reset/Block Temporary Unprotect (RP). The
Reset/Block Temporary Unprotect pin can be
used to apply a Hardware Reset to the memory or
to temporarily unprotect all Blocks that have been
protected.
Note that if VPP/WP is at VIL, then the two outer-
most boot blocks will remain protected even if RP
is at VID.
A Hardware Reset is achieved by holding Reset/
Block Temporary Unprotect Low, VIL, for at least
tPLPX. After Reset/Block Temporary Unprotect
goes High, VIH, the memory will be ready for Bus
Read and Bus Write operations after tPHEL or
tRHEL, whichever occurs last. See the Ready/Busy
Output section, Table 16. and Figure 16., Reset/
Block Temporary Unprotect AC Waveforms, for
more details.
Holding RP at VID will temporarily unprotect the
protected Blocks in the memory. Program and
Erase operations on all blocks will be possible.
The transition from VIH to VID must be slower than
tPHPHH.
Ready/Busy Output (RB). The Ready/Busy pin
is an open-drain output that can be used to identify
when the device is performing a Program or Erase
operation. During Program or Erase operations
11/46
M29W320ET, M29W320EB
Ready/Busy is Low, VOL. Ready/Busy is high-im-
pedance during Read mode, Auto Select mode
and Erase Suspend mode.
After a Hardware Reset, Bus Read and Bus Write
operations cannot begin until Ready/Busy be-
comes high-impedance. See Table 16. and Figure
16., Reset/Block Temporary Unprotect AC Wave-
forms.
The use of an open-drain output allows the Ready/
Busy pins from several memories to be connected
to a single pull-up resistor. A Low will then indicate
that one, or more, of the memories is busy.
Byte/Word Organization Select (BYTE). The
Byte/Word Organization Select pin is used to
switch between the x8 and x16 Bus modes of the
memory. When Byte/Word Organization Select is
Low, VIL, the memory is in x8 mode, when it is
High, VIH, the memory is in x16 mode.
VCC Supply Voltage (2.7V to 3.6V). VCC pro-
vides the power supply for all operations (Read,
Program and Erase).
The Command Interface is disabled when the VCC
Supply Voltage is less than the Lockout Voltage,
VLKO. This prevents Bus Write operations from ac-
cidentally damaging the data during power up,
power down and power surges. If the Program/
Erase Controller is programming or erasing during
this time then the operation aborts and the memo-
ry contents being altered will be invalid.
A 0.1µF capacitor should be connected between
the VCC Supply Voltage pin and the VSS Ground
pin to decouple the current surges from the power
supply. The PCB track widths must be sufficient to
carry the currents required during Program and
Erase operations, ICC3.
VSS Ground. VSS is the reference for all voltage
measurements. The device features two VSS pins
which must be both connected to the system
ground.
M29W320ET, M29W320EB
BUS OPERATIONS
There are five standard bus operations that control
the device. These are Bus Read, Bus Write, Out-
put Disable, Standby and Automatic Standby.
See Table 2. and Table 3., Bus Operations, for a
summary. Typically glitches of less than 5ns on
Chip Enable or Write Enable are ignored by the
memory and do not affect bus operations.
Bus Read. Bus Read operations read from the
memory cells, or specific registers in the Com-
mand Interface. A valid Bus Read operation in-
volves setting the desired address on the Address
Inputs, applying a Low signal, VIL, to Chip Enable
and Output Enable and keeping Write Enable
High, VIH. The Data Inputs/Outputs will output the
value, see Figure 11., Read Mode AC Waveforms,
and Table 12., Read AC Characteristics, for de-
tails of when the output becomes valid.
Bus Write. Bus Write operations write to the
Command Interface. A valid Bus Write operation
begins by setting the desired address on the Ad-
dress Inputs. The Address Inputs are latched by
the Command Interface on the falling edge of Chip
Enable or Write Enable, whichever occurs last.
The Data Inputs/Outputs are latched by the Com-
mand Interface on the rising edge of Chip Enable
or Write Enable, whichever occurs first. Output En-
able must remain High, VIH, during the whole Bus
Write operation. See Figure 12. and Figure 13.,
Write AC Waveforms, and Table 13. and Table
14., Write AC Characteristics, for details of the tim-
ing requirements.
Output Disable. The Data Inputs/Outputs are in
the high impedance state when Output Enable is
High, VIH.
Standby. When Chip Enable is High, VIH, the
memory enters Standby mode and the Data In-
puts/Outputs pins are placed in the high-imped-
ance state. To reduce the Supply Current to the
Standby Supply Current, ICC2, Chip Enable should
be held within VCC ± 0.2V. For the Standby current
level see Table 11., DC Characteristics.
During program or erase operations the memory
will continue to use the Program/Erase Supply
Current, ICC3, for Program or Erase operations un-
til the operation completes.
Automatic Standby. If CMOS levels (VCC ± 0.2V)
are used to drive the bus and the bus is inactive for
300ns or more the memory enters Automatic
Standby where the internal Supply Current is re-
duced to the Standby Supply Current, ICC2. The
Data Inputs/Outputs will still output data if a Bus
Read operation is in progress.
Special Bus Operations
Additional bus operations can be performed to
read the Electronic Signature and also to apply
and remove Block Protection. These bus opera-
tions are intended for use by programming equip-
ment and are not usually used in applications.
They require VID to be applied to some pins.
Electronic Signature. The memory has two
codes, the manufacturer code and the device
code, that can be read to identify the memory.
These codes can be read by applying the signals
listed in Table 2. and Table 3., Bus Operations.
Block Protect and Chip Unprotect. Groups of
blocks can be protected against accidental Pro-
gram or Erase. The Protection Groups are shown
in APPENDIX A., Table 20. and Table 21., Block
Addresses. The whole chip can be unprotected to
allow the data inside the blocks to be changed.
The VPP/Write Protect pin can be used to protect
the two outermost boot blocks. When VPP/Write
Protect is at VIL the two outermost boot blocks are
protected and remain protected regardless of the
Block Protection Status or the Reset/Block Tem-
porary Unprotect pin status.
Block Protect and Chip Unprotect operations are
described in APPENDIX D.
13/46
M29W320ET, M29W320EB
Table 2. Bus Operations, BYTE = VIL
Note: X = VIL or VIH.
Table 3. Bus Operations, BYTE = VIH
Note: X = VIL or VIH.
M29W320ET, M29W320EB
COMMAND INTERFACE
All Bus Write operations to the memory are inter-
preted by the Command Interface. Commands
consist of one or more sequential Bus Write oper-
ations. Failure to observe a valid sequence of Bus
Write operations will result in the memory return-
ing to Read mode. The long command sequences
are imposed to maximize data security.
The address used for the commands changes de-
pending on whether the memory is in 16-bit or 8-
bit mode. See either Table 4., or Table 5., depend-
ing on the configuration that is being used, for a
summary of the commands.
Read/Reset Command
The Read/Reset command returns the memory to
its Read mode. It also resets the errors in the Sta-
tus Register. Either one or three Bus Write opera-
tions can be used to issue the Read/Reset
command.
The Read/Reset command can be issued, be-
tween Bus Write cycles before the start of a pro-
gram or erase operation, to return the device to
read mode. If the Read/Reset command is issued
during the time-out of a Block erase operation then
the memory will take up to 10µs to abort. During
the abort period no valid data can be read from the
memory. The Read/Reset command will not abort
an Erase operation when issued while in Erase
Suspend.
Auto Select Command
The Auto Select command is used to read the
Manufacturer Code, the Device Code, the Block
Protection Status and the Extended Memory Block
Verify Code. Three consecutive Bus Write opera-
tions are required to issue the Auto Select com-
mand. The memory remains in Auto Select mode
until a Read/Reset or CFI Query command is is-
sued.
In Auto Select mode the Manufacturer Code can
be read using a Bus Read operation with A0 = VIL
and A1 = VIL. The other address bits may be set to
either VIL or VIH.
The Device Code can be read using a Bus Read
operation with A0 = VIH and A1 = VIL. The other
address bits may be set to either VIL or VIH.
The Block Protection Status of each block can be
read using a Bus Read operation with A0 = VIL,= VIH and A12-A20 specifying the block ad-
dress. The other address bits may be set to either
VIL or VIH. If the addressed block is protected then
01h is output on Data Inputs/Outputs DQ0-DQ7,
otherwise 00h is output.
Read CFI Query Command
The Read CFI Query Command is used to read
data from the Common Flash Interface (CFI)
Memory Area. This command is valid when the de-
vice is in the Read Array mode, or when the device
is in Auto Select mode.
One Bus Write cycle is required to issue the Read
CFI Query Command. Once the command is is-
sued subsequent Bus Read operations read from
the Common Flash Interface Memory Area.
The Read/Reset command must be issued to re-
turn the device to the previous mode (the Read Ar-
ray mode or Auto Select mode). A second Read/
Reset command would be needed if the device is
to be put in the Read Array mode from Auto Select
mode.
See APPENDIX B., Tables 22, 23, 24, 25, 26 and
27 for details on the information contained in the
Common Flash Interface (CFI) memory area.
Program Command
The Program command can be used to program a
value to one address in the memory array at a
time. The command requires four Bus Write oper-
ations, the final write operation latches the ad-
dress and data, and starts the Program/Erase
Controller.
If the address falls in a protected block then the
Program command is ignored, the data remains
unchanged. The Status Register is never read and
no error condition is given.
During the program operation the memory will ig-
nore all commands. It is not possible to issue any
command to abort or pause the operation. After
programming has started, Bus Read operations
output the Status Register content. See the sec-
tion on the STATUS REGISTER for more details.
Typical program times are given in Table 6.
After the program operation has completed the
memory will return to the Read mode, unless an
error has occurred. When an error occurs Bus
Read operations will continue to output the Status
Register. A Read/Reset command must be issued
to reset the error condition and return to Read
mode.
Note that the Program command cannot change a
bit set at ’0’ back to ’1’. One of the Erase Com-
mands must be used to set all the bits in a block or
in the whole memory from ’0’ to ’1’.
15/46
M29W320ET, M29W320EB
Fast Program Commands
There are two Fast Program commands available
to improve the programming throughput, by writing
several adjacent words or bytes in parallel. The
Quadruple Byte Program command is available for
x8 operations, while the Double Word Program
command is available for x16 operations.
Fast Program commands should not be attempted
when VPP/WP is not at VPP. Care must be taken
because applying a 12V VPP voltage to the VPP/
WP pin will temporarily unprotect any protected
block.
After programming has started, Bus Read opera-
tions output the Status Register content.
After the program operation has completed the
memory will return to the Read mode, unless an
error has occurred. When an error occurs Bus
Read operations will continue to output the Status
Register. A Read/Reset command must be issued
to reset the error condition and return to Read
mode.
Note that the Fast Program commands cannot
change a bit set at ’0’ back to ’1’. One of the Erase
Commands must be used to set all the bits in a
block or in the whole memory from ’0’ to ’1’.
Typical Program times are given in Table
6., Program, Erase Times and Program, Erase
Endurance Cycles
Quadruple Byte Program Command. The Qua-
druple Byte Program command is used to write a
page of four adjacent Bytes in parallel. The four
bytes must differ only for addresses A0, DQ15A-1.
Five bus write cycles are necessary to issue the
Quadruple Byte Program command. The first bus cycle sets up the Quadruple Byte
Program Command. The second bus cycle latches the Address and
the Data of the first byte to be written. The third bus cycle latches the Address and
the Data of the second byte to be written. The fourth bus cycle latches the Address and
the Data of the third byte to be written. The fifth bus cycle latches the Address and the
Data of the fourth byte to be written and starts
the Program/Erase Controller.
Double Word Program Command. The Double
Word Program command is used to write a page
of two adjacent words in parallel. The two words
must differ only for the address A0.
Three bus write cycles are necessary to issue the
Double Word Program command. The first bus cycle sets up the Double Word
Program Command. The second bus cycle latches the Address and
the Data of the first word to be written. The third bus cycle latches the Address and
the Data of the second word to be written and
starts the Program/Erase Controller.
Unlock Bypass Command
The Unlock Bypass command is used in conjunc-
tion with the Unlock Bypass Program command to
program the memory faster than with the standard
program commands. When the cycle time to the
device is long, considerable time saving can be
made by using these commands. Three Bus Write
operations are required to issue the Unlock By-
pass command.
Once the Unlock Bypass command has been is-
sued the memory enters Unlock Bypass mode.
The Unlock Bypass Program command can then
be issued to program addresses or the Unlock By-
pass Reset command can be issued to return to
Read mode. In Unlock Bypass mode the memory
can be read as if in Read mode.
When VPP is applied to the VPP/Write Protect pin
the memory automatically enters the Unlock By-
pass mode and the Unlock Bypass Program com-
mand can be issued immediately. Care must be
taken because applying a 12V VPP voltage to the
VPP/WP pin will temporarily unprotect any protect-
ed block.
Unlock Bypass Program Command
The Unlock Bypass Program command can be
used to program one address in the memory array
at a time. The command requires two Bus Write
operations, the final write operation latches the ad-
dress and data, and starts the Program/Erase
Controller.
The Program operation using the Unlock Bypass
Program command behaves identically to the Pro-
gram operation using the Program command. The
operation cannot be aborted, a Bus Read opera-
tion outputs the Status Register. See the Program
command for details on the behavior.
Unlock Bypass Reset Command
The Unlock Bypass Reset command can be used
to return to Read/Reset mode from Unlock Bypass
Mode. Two Bus Write operations are required to
issue the Unlock Bypass Reset command. Read/
Reset command does not exit from Unlock Bypass
Mode.
Chip Erase Command
The Chip Erase command can be used to erase
the entire chip. Six Bus Write operations are re-
quired to issue the Chip Erase Command and start
the Program/Erase Controller.
If any blocks are protected then these are ignored
and all the other blocks are erased. If all of the
blocks are protected the Chip Erase operation ap-
pears to start but will terminate within about 100µs,
M29W320ET, M29W320EB
leaving the data unchanged. No error condition is
given when protected blocks are ignored.
During the erase operation the memory will ignore
all commands, including the Erase Suspend com-
mand. It is not possible to issue any command to
abort the operation. Typical chip erase times are
given in Table 6.. All Bus Read operations during
the Chip Erase operation will output the Status
Register on the Data Inputs/Outputs. See the sec-
tion on the Status Register for more details.
After the Chip Erase operation has completed the
memory will return to the Read Mode, unless an
error has occurred. When an error occurs the
memory will continue to output the Status Regis-
ter. A Read/Reset command must be issued to re-
set the error condition and return to Read Mode.
The Chip Erase Command sets all of the bits in un-
protected blocks of the memory to ’1’. All previous
data is lost.
Block Erase Command
The Block Erase command can be used to erase
a list of one or more blocks. It sets all of the bits in
the unprotected selected blocks to ’1’. All previous
data in the selected blocks is lost.
Six Bus Write operations are required to select the
first block in the list. Each additional block in the
list can be selected by repeating the sixth Bus
Write operation using the address of the additional
block. The Block Erase operation starts the Pro-
gram/Erase Controller after a time-out period of
50µs after the last Bus Write operation. Once the
Program/Erase Controller starts it is not possible
to select any more blocks. Each additional block
must therefore be selected within 50µs of the last
block. The 50µs timer restarts when an additional
block is selected. After the sixth Bus Write opera-
tion a Bus Read operation will output the Status
Register. See the Status Register section for de-
tails on how to identify if the Program/Erase Con-
troller has started the Block Erase operation.
If any selected blocks are protected then these are
ignored and all the other selected blocks are
erased. If all of the selected blocks are protected
the Block Erase operation appears to start but will
terminate within about 100µs, leaving the data un-
changed. No error condition is given when protect-
ed blocks are ignored.
During the Block Erase operation the memory will
ignore all commands except the Erase Suspend
command and the Read/Reset command which is
only accepted during the 50µs time-out period.
Typical block erase times are given in Table 6.
After the Erase operation has started all Bus Read
operations will output the Status Register on the
Data Inputs/Outputs. See the section on the Sta-
tus Register for more details.
After the Block Erase operation has completed the
memory will return to the Read Mode, unless an
error has occurred. When an error occurs Bus
Read operations will continue to output the Status
Register. A Read/Reset command must be issued
to reset the error condition and return to Read
mode.
Erase Suspend Command
The Erase Suspend Command may be used to
temporarily suspend a Block Erase operation and
return the memory to Read mode. The command
requires one Bus Write operation.
The Program/Erase Controller will suspend within
the Erase Suspend Latency time of the Erase Sus-
pend Command being issued. Once the Program/
Erase Controller has stopped the memory will be
set to Read mode and the Erase will be suspend-
ed. If the Erase Suspend command is issued dur-
ing the period when the memory is waiting for an
additional block (before the Program/Erase Con-
troller starts) then the Erase is suspended immedi-
ately and will start immediately when the Erase
Resume Command is issued. It is not possible to
select any further blocks to erase after the Erase
Resume.
During Erase Suspend it is possible to Read and
Program cells in blocks that are not being erased;
both Read and Program operations behave as
normal on these blocks. If any attempt is made to
program in a protected block or in the suspended
block then the Program command is ignored and
the data remains unchanged. The Status Register
is not read and no error condition is given. Read-
ing from blocks that are being erased will output
the Status Register.
It is also possible to issue the Auto Select, Read
CFI Query and Unlock Bypass commands during
an Erase Suspend. The Read/Reset command
must be issued to return the device to Read Array
mode before the Resume command will be ac-
cepted.
During Erase Suspend a Bus Read operation to
the Extended Block will output the Extended Block
data.
Erase Resume Command
The Erase Resume command must be used to re-
start the Program/Erase Controller after an Erase
Suspend. The device must be in Read Array mode
before the Resume command will be accepted. An
erase can be suspended and resumed more than
once.
Enter Extended Block Command
The M29W320E has an extra 64KByte block (Ex-
tended Block) that can only be accessed using the
Enter Extended Block command. Three Bus write
cycles are required to issue the Extended Block
command. Once the command has been issued
17/46
M29W320ET, M29W320EB
the device enters Extended Block mode where all
Bus Read or Program operations to the Boot Block
addresses access the Extended Block. The Ex-
tended Block (with the same address as the boot
block) cannot be erased, and can be treated as
one-time programmable (OTP) memory. In Ex-
tended Block mode the Boot Blocks are not acces-
sible.
To exit from the Extended Block mode the Exit Ex-
tended Block command must be issued.
The Extended Block can be protected, however
once protected the protection cannot be undone.
Exit Extended Block Command
The Exit Extended Block command is used to exit
from the Extended Block mode and return the de-
vice to Read mode. Four Bus Write operations are
required to issue the command.
Block Protect and Chip Unprotect Commands
Groups of blocks can be protected against acci-
dental Program or Erase. The Protection Groups
are shown in APPENDIX A., Table 20. and Table
21., Block Addresses. The whole chip can be un-
protected to allow the data inside the blocks to be
changed.
Block Protect and Chip Unprotect operations are
described in APPENDIX D.
Table 4. Commands, 16-bit mode, BYTE = VIH
Note: X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block. All values in the table are in hexadecimal.
The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A20, DQ8-DQ14 and DQ15 are Don’t
Care. DQ15A–1 is A–1 when BYTE is VIL or DQ15 when BYTE is VIH.
M29W320ET, M29W320EB
Table 5. Commands, 8-bit mode, BYTE = VIL
Note: X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block. All values in the table are in hexadecimal.
The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A20, DQ8-DQ14 and DQ15 are Don’t
Care. DQ15A–1 is A–1 when BYTE is VIL or DQ15 when BYTE is VIH.
Table 6. Program, Erase Times and Program, Erase Endurance Cycles
Note:1. Typical values measured at room temperature and nominal voltages. Sampled, but not 100% tested. Maximum value measured at worst case conditions for both temperature and VCC after 100,00 program/erase cycles. Maximum value measured at worst case conditions for both temperature and VCC.
19/46
M29W320ET, M29W320EB
STATUS REGISTER
The M29W320E has one Status Register. It pro-
vides information on the current or previous Pro-
gram or Erase operations. The various bits convey
information and errors on the operation. Bus Read
operations from any address, always read the Sta-
tus Register during Program and Erase opera-
tions. It is also read during Erase Suspend when
an address within a block being erased is access-
ed.
The bits in the Status Register are summarized in
Table 7., Status Register Bits.
Data Polling Bit (DQ7). The Data Polling Bit can
be used to identify whether the Program/Erase
Controller has successfully completed its opera-
tion or if it has responded to an Erase Suspend.
The Data Polling Bit is output on DQ7 when the
Status Register is read.
During Program operations the Data Polling Bit
outputs the complement of the bit being pro-
grammed to DQ7. After successful completion of
the Program operation the memory returns to
Read mode and Bus Read operations from the ad-
dress just programmed output DQ7, not its com-
plement.
During Erase operations the Data Polling Bit out-
puts ’0’, the complement of the erased state of
DQ7. After successful completion of the Erase op-
eration the memory returns to Read Mode.
In Erase Suspend mode the Data Polling Bit will
output a ’1’ during a Bus Read operation within a
block being erased. The Data Polling Bit will
change from a ’0’ to a ’1’ when the Program/Erase
Controller has suspended the Erase operation.
Figure 7., Data Polling Flowchart, gives an exam-
ple of how to use the Data Polling Bit. A Valid Ad-
dress is the address being programmed or an
address within the block being erased.
Toggle Bit (DQ6). The Toggle Bit can be used to
identify whether the Program/Erase Controller has
successfully completed its operation or if it has re-
sponded to an Erase Suspend. The Toggle Bit is
output on DQ6 when the Status Register is read.
During Program and Erase operations the Toggle
Bit changes from ’0’ to ’1’ to ’0’, etc., with succes-
sive Bus Read operations at any address. After
successful completion of the operation the memo-
ry returns to Read mode.
During Erase Suspend mode the Toggle Bit will
output when addressing a cell within a block being
erased. The Toggle Bit will stop toggling when the
Program/Erase Controller has suspended the
Erase operation.
Figure 8., Toggle Flowchart, gives an example of
how to use the Data Toggle Bit. Figure 14. and
Figure 15. describe Toggle Bit timing waveform.
Error Bit (DQ5). The Error Bit can be used to
identify errors detected by the Program/Erase
Controller. The Error Bit is set to ’1’ when a Pro-
gram, Block Erase or Chip Erase operation fails to
write the correct data to the memory. If the Error
Bit is set a Read/Reset command must be issued
before other commands are issued. The Error bit
is output on DQ5 when the Status Register is read.
Note that the Program command cannot change a
bit set to ’0’ back to ’1’ and attempting to do so will
set DQ5 to ‘1’. A Bus Read operation to that ad-
dress will show the bit is still ‘0’. One of the Erase
commands must be used to set all the bits in a
block or in the whole memory from ’0’ to ’1’.
Erase Timer Bit (DQ3). The Erase Timer Bit can
be used to identify the start of Program/Erase
Controller operation during a Block Erase com-
mand. Once the Program/Erase Controller starts
erasing the Erase Timer Bit is set to ’1’. Before the
Program/Erase Controller starts the Erase Timer
Bit is set to ’0’ and additional blocks to be erased
may be written to the Command Interface. The
Erase Timer Bit is output on DQ3 when the Status
Register is read.
Alternative Toggle Bit (DQ2). The Alternative
Toggle Bit can be used to monitor the Program/
Erase controller during Erase operations. The Al-
ternative Toggle Bit is output on DQ2 when the
Status Register is read.
During Chip Erase and Block Erase operations the
Toggle Bit changes from ’0’ to ’1’ to ’0’, etc., with
successive Bus Read operations from addresses
within the blocks being erased. A protected block
is treated the same as a block not being erased.
Once the operation completes the memory returns
to Read mode.
During Erase Suspend the Alternative Toggle Bit
changes from ’0’ to ’1’ to ’0’, etc. with successive
Bus Read operations from addresses within the
blocks being erased. Bus Read operations to ad-
dresses within blocks not being erased will output
the memory cell data as if in Read mode.
After an Erase operation that causes the Error Bit
to be set the Alternative Toggle Bit can be used to
identify which block or blocks have caused the er-
ror. The Alternative Toggle Bit changes from ’0’ to
’1’ to ’0’, etc. with successive Bus Read Opera-
tions from addresses within blocks that have not
erased correctly. The Alternative Toggle Bit does
not change if the addressed block has erased cor-
rectly.
Figure 14. and Figure 15. describe Alternative
Toggle Bit timing waveform.
M29W320ET, M29W320EB
Table 7. Status Register Bits
Note: Unspecified data bits should be ignored.
21/46
M29W320ET, M29W320EB
MAXIMUM RATING
Stressing the device above the rating listed in the
Absolute Maximum Ratings table may cause per-
manent damage to the device. Exposure to Abso-
lute Maximum Rating conditions for extended
periods may affect device reliability. These are
stress ratings only and operation of the device at
these or any other conditions above those indicat-
ed in the Operating sections of this specification is
not implied. Refer also to the STMicroelectronics
SURE Program and other relevant quality docu-
ments.
Table 8. Absolute Maximum Ratings
Note:1. Compliant with the ECOPACK® 7191395 specification for Lead-free soldering processes. Not exceeding 250°C for more than 30s, and peaking at 260°C. Minimum voltage may undershoot to –2V during transition and for less than 20ns during transitions. Maximum voltage may overshoot to VCC +2V during transition and for less than 20ns during transitions. VPP must not remain at 12V for more than a total of 80hrs.
M29W320ET, M29W320EB
DC AND AC PARAMETERS
This section summarizes the operating measure-
ment conditions, and the DC and AC characteris-
tics of the device. The parameters in the DC and
AC characteristics Tables that follow, are derived
from tests performed under the Measurement
Conditions summarized in Table 9., Operating and
AC Measurement Conditions. Designers should
check that the operating conditions in their circuit
match the operating conditions when relying on
the quoted parameters.
Table 9. Operating and AC Measurement Conditions
Table 10. Device Capacitance
Note: Sampled only, not 100% tested.
23/46
M29W320ET, M29W320EB
Table 11. DC Characteristics
Note:1. Sampled only, not 100% tested. In Dual operations the Supply Current will be the sum of ICC1(read) and ICC3 (program/erase).
