ADUC834BS ,MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCUSPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 8Programming the Flash/EE Data Memory ..
ADUC836BCP ,Precision Analog Microcontroller: 1MIPS 8052 MCU + 62kB Flash + Dual 16-Bit ADC + 12-Bit DACSPECIFICATIONS Conversion Rate 5.4 On Both Channels ..
ADUC836BS ,MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCUSPECIFICATIONS Conversion Rate 5.4 On Both Channels ..
ADUC836BS ,MicroConverter, Dual 16-Bit-ADCs with Embedded 62 kB Flash MCUSPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Parallel Programm ..
ADUC841BCP62-3 ,Precision Analog Microcontroller: 20MIPS 8052 Flash MCU + 8-Ch 12-Bit ADC + Dual 12-Bit DACFEATURES Pin compatable ugrade of ADuC812/ADuC831/ADuC832 12-BITADuC841/ADuC842/ADuC843 1Increased ..
ADUC841BCP62-5 ,Precision Analog Microcontroller: 20MIPS 8052 Flash MCU + 8-Ch 12-Bit ADC + Dual 12-Bit DACAPPLICATIONS The microcontroller is an optimized 8052 core offering up to Optical networking—laser ..
AM27C010 , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
AM27C010-120DC , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
AM27C010-120DC , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
AM27C010-120DE , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
AM27C010-120DI , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
AM27C010-120JC , 1 Megabit ( 128 K x 8-Bit ) CMOS EPROM Speed options as fast as 45 ns
ADUC834BS
MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCU
PRELIMINARY TECHNICAL DATA
MicroConverter®, Dual 16-/24- Bit ADCs
with Embedded 62KB FLASH MCU
FEATURES
High Resolution Sigma-Delta ADCs
Two Independent ADCs (16- and 24-Bit Resolution)
24-Bit No Missing Codes, Primary ADC
13-Bit p-p Resolution @ 20Hz, 20mV Range
18-Bit p-p Resolution @ 20Hz, 2.56V Range
Memory
62Kbytes On-Chip Flash/EE Program Memory
4 KBytes On-Chip Flash/EE Data Memory
Flash/EE, 100Yr Retention, 100Kcycles Endurance
In Circuit Serial Download
High Speed User Bootload (5s Download)
2304 Bytes On-Chip Data RAM
8051 Based Core
8051-Compatible Instruction Set (12.58MHz Max)kHz External Crystal, On-Chip Programmable PLL
11 Interrupt Sources, Two Priority Levels
Dual Data Pointer
Extended 11-bit Stack Pointer
On-Chip Peripherals
12-Bit Voltage Output DAC
Dual 16-Bit ΣΔΣΔΣΔΣΔΣΔ DACs/PWMs
On-Chip Temperature Sensor
Dual Excitation Current Sources
Time Interval Counter (Real Time Clock/WakeUp Cct)
UART and SPI® Serial I/O
Timer 3 for high speed UART baud rates (incl 115,200)
Watchdog Timer (WDT), Power Supply Monitor (PSM)
Power
Specified for 3V and 5V Operation
Normal: 3mA @ 3V (Core CLK = 1.5MHz)
Power-Down: 20μA max with wake-up cct runningMicroConverter is a registered trademark of Analog Devices, Inc.
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTIONThe ADuC834 is a complete smart transducer front-end, inte-
grating two high-resolution sigma delta ADCs, an 8-bit MCU,
and program/data Flash/EE Memory on a single chip.
The two independent ADCs (Primary and Auxiliary) include a
temperature sensor and a PGA (allowing direct measurement of
low-level signals). The ADCs with on-chip digital filtering and
programmable output data rates are intended for the measure-
ment of wide dynamic range, low frequency signals, such as those
in weigh scale, strain-gauge, pressure transducer, or temperature
measurement applications.
The device operates from a 32 kHz crystal with an on-chip PLL
generating a high-frequency clock of 12.58 MHz. This clock is,
routed through a programmable clock divider from which the
MCU core clock operating frequency is generated. The micro-
controller core is an 8052 and therefore 8051 instruction set
compatible with 12 core clock periods per machine cycle.
62 Kbytes of nonvolatile Flash/EE program memory are provided
on-chip. 4 Kbytes of nonvolatile Flash/EE data memory, 256bytes
RAM and 2 KBytes of extended RAM are also integrated on-chip.
The program memory can be configured as data memory in
datalogging applications.
The ADuC834 also incorporates additional analog functionality
with a 12-bit DAC, dual current sources, power supply monitor,
and a bandgap reference. On-chip digital peripherals include two
16-bit ΣΔ DACs/PWM, watchdog timer, real time clock (time
interval counter), four timers/counters, and two serial I/O ports
(UART and SPI).
On-chip factory firmware supports in-circuit serial download (via
UART), as well as single-pin emulation mode via the EA pin. A
functional block diagram of the ADuC834 is shown above with a
more detailed block diagram shown in figure 11 (page 18).
The part operates from a 3V or a 5V supply. When operating from
3V the power dissipation for the part is below 10mW. The
ADuC834 is housed in a 52-lead MQFP package.
APPLICATIONS
Intelligent Sensors (IEEE1451.2-Compatible)
Weigh Scales
Portable Instrumentation
Pressure Transducers
4–20mA TransmittersXTAL2XTAL1
REFIN+REFIN›
AIN1
AIN2
AIN3
AIN4
AIN5DAC
IEXC1
IEXC2
ADuC834
PRELIMINARY TECHNICAL DATAOVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TIMING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . 8
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . 17
ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . . . 18
MEMORY ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . 21
SPECIAL FUNCTION REGISTERS (SFRS) . . . . . . . . . . 22
Accumulator (ACC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
B SFR (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Stack Pointer (SP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Data Pointer (DPTR) . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Program Status Word (PSW) . . . . . . . . . . . . . . . . . . . . . 23
Power Control (PCON) . . . . . . . . . . . . . . . . . . . . . . . . . 23
ADuC834 Configuration SFR (CFG834) . . . . . . . . . . . .23
Complete SFR Map . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
PRIMARY AND AUXILIARY ADCs . . . . . . . . . . . . . . . . 25
ADCSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ADCMODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ADC0CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ADC1CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
ADC0H/M/L / ADC1H/L . . . . . . . . . . . . . . . . . . . . . . . . 28
OF0H/M/L / OF1H/L . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
GN0H/M/L / GN1H/L . . . . . . . . . . . . . . . . . . . . . . . . . .28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ICON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
PRIMARY AND AUX ADC NOISE PERFORMANCE . .30
PRIMARY AND AUXILIARY ADC DESCRIPTION . . . 31
Primary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Auxiliary ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Analog Input Channels . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Primary and Auxiliary ADC Inputs . . . . . . . . . . . . . . . . . 33
Analog Input Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Programmable Gain Amplifier . . . . . . . . . . . . . . . . . . . . . 33
Bipolar/Unipolar Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Burnout Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Excitation Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Reference Detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Sigma-Delta Modulator . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Digital Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
ADC Chopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
NONVOLATILE FLASH/EE MEMORY . . . . . . . . . . . . . 37
Flash/EE Memory Overview . . . . . . . . . . . . . . . . . . . . . . 37
Flash/EE Memory and the ADuC834 . . . . . . . . . . . . . . . 37
ADuC834 Flash/EE Memory Reliability . . . . . . . . . . . . . 37
USING THE FLASH/EE PROGRAM MEMORY . . . . . . 38
USING THE FLASH/EE DATA MEMORY . . . . . . . . . . . 39
ECON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Programming the Flash/EE Data Memory . . . . . . . . . . . 40
FLASH/EE MEMORY TIMING . . . . . . . . . . . . . . . . . . . . 40
DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DACCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Using the DAC Converter . . . . . . . . . . . . . . . . . . . . . . . . 41
PWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
PWMCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
ON-CHIP PLL (PLLCON) . . . . . . . . . . . . . . . . . . . . . . . . 46
TIME INTERVAL COUNTER (TIMECON) . . . . . . . . . . 47
WATCHDOG TIMER (WDCON) . . . . . . . . . . . . . . . . . . 49
POWER SUPPLY MONITOR (PSMCON) . . . . . . . . . . . 50
SERIAL PERIPHERAL INTERFACE . . . . . . . . . . . . . . . . 51
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
SPICON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Using the SPI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . 52
DUAL DATA POINTER (DPCON) . . . . . . . . . . . . . . . . . 53
8051-COMPATIBLE PERIPHERALS . . . . . . . . . . . . . . . . 54
Parallel I/O Ports 0–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Additional High Current Digital Output Pins . . . . . . . . . 54
TIMERS/COUNTERS . . . . . . . . . . . . . . . . . . . . . . . . . . 55
TMOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
TCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Timer/Counter 0/1 Modes of Operation . . . . . . . . . . . 57
Timer 2 Operating Modes . . . . . . . . . . . . . . . . . . . . . .58
T2CON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
UART Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
SCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
UART Operating Modes . . . . . . . . . . . . . . . . . . . . . . . 61
Baud Rate Generation using Timer 1 and Timer 2 . . .62
Baud Rate Generation using Timer 3 . . . . . . . . . . . . .63
INTERRUPT SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
HARDWARE DESIGN CONSIDERATIONS . . . . . . . . . . 66
External Memory Interface . . . . . . . . . . . . . . . . . . . . . . . 66
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Power-On Reset Operation . . . . . . . . . . . . . . . . . . . . . . . 67
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Power-Saving Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Grounding and Board Layout Recommendations . . . . . . 68
System Self-Identification . . . . . . . . . . . . . . . . . . . . . . . . 68
Clock Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
OTHER HARDWARE CONSIDERATIONS . . . . . . . . . . 69
In-Circuit Serial Download Access . . . . . . . . . . . . . . . . . 69
Embedded Serial Port Debugger . . . . . . . . . . . . . . . . . . . 69
Single-Pin Emulation Mode . . . . . . . . . . . . . . . . . . . . . . 69
TABLE OF CONTENTS
ADuC834
PRELIMINARY TECHNICAL DATA
(AVDD = 2.7V to 3.6V or 4.75V to 5.25V, DVDD = 2.7V to 3.6V or 4.75V to 5.25V,
REFIN(+) = 2.5V, REFIN(–) = AGND; AGND = DGND = 0V; XTAL1/XTAL2 = 32.768kHz
Crystal; all specifications TMIN to TMAX unless otherwise noted.)SPECIFICATIONS1
ADuC834–SPECIFICATIONS1
PRELIMINARY TECHNICAL DATAANALOG INPUTS/REFERENCE INPUTS
ANALOG (DAC) OUTPUTS
ADuC834
PRELIMINARY TECHNICAL DATA
