ADUC831BS ,MicroConverter/ 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCUOverview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Interrupt System . . . . . ..
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 ..
AM27512-30DC , 65,536x8-Bit UV Erasable PROM
AM27512-30DI , 65,536x8-Bit UV Erasable PROM
AM27512-3DC , 65,536x8-Bit UV Erasable PROM
AM27512-3DI , 65,536x8-Bit UV Erasable PROM
AM27512-45DC , 65,536x8-Bit UV Erasable PROM
AM27512-45DI , 65,536x8-Bit UV Erasable PROM
ADUC831BS
MicroConverter/ 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU
REV.0
FEATURES
ANALOG I/O
8-Channel, 247 kSPS 12-Bit ADC
DC Performance: �1 LSB INL
AC Performance: 71 dB SNR
DMA Controller for High Speed ADC-to-RAM Capture
2 12-Bit (Monotonic) Voltage Output DACs
Dual Output PWM/�-� DACs
On-Chip Temperature Sensor Function �3�C
On-Chip Voltage Reference
Memory
62 kBytes On-Chip Flash/EE Program Memory
4 kBytes On-Chip Flash/EE Data Memory
Flash/EE, 100Yr Retention, 100kCycles Endurance
2304 Bytes On-Chip Data RAM
8051 Based Core
8051 Compatible Instruction Set (16MHz Max)
12 Interrupt Sources, 2 Priority Levels
Dual Data Pointer
Extended 11-Bit Stack Pointer
On-Chip Peripherals
Time Interval Counter (TIC)
UART, I2C®, and SPI® Serial I/O
Watchdog Timer (WDT), Power Supply Monitor (PSM)
Power
Specified for 3V and 5V Operation
Normal, Idle, and Power-Down Modes
Power-Down: 20 �A @ 3V
APPLICATIONS
Optical Networking—Laser Power Control
Base Station Systems
Precision Instrumentation, Smart Sensors
Transient Capture Systems
DAS and Communications Systems
Pin compatible upgrade to existing ADuC812 systems
that require additional code or data memory. Runs
from 1 MHz–16 MHz to external crystal.
The ADuC832 is also available. Functionally is the same
as the ADuC831, except the ADuC832 runs from a 32kHz
external crystal with on-chip PLL.MicroConverter is a registered trademark and QuickStart is a trademark
of Analog Devices, Inc.
SPI is a registered trademark of Motorola, Inc.
I2C is a registered trademark of Philips Corporation.
GENERAL DESCRIPTIONThe ADuC831 is a fully integrated 247 kSPS data acquisition
system incorporating a high performance self-calibrating multi-
channel 12-bit ADC, dual 12-bit DACs, and programmable
8-bit MCU on a single chip.
The microcontroller 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. Four kBytes of nonvolatile Flash/EE data
memory, 256bytes RAM and 2 kBytes of extended RAM are
also integrated on-chip.
The ADuC831 also incorporates additional analog functionality
with two 12-bit DACs, power supply monitor, and a band gap
reference. On-chip digital peripherals include two 16-bit Σ-∆
DACs, dual output 16-bit PWM, watchdog timer, time interval
counter, three timers/counters, Timer 3 for baud rate generation
and serial I/O ports (I2C, SPI and UART).
On-chip factory firmware supports in-circuit serial download and
debug modes (via UART), as well as single-pin emulation mode
via the EA pin. The ADuC831 is supported by QuickStart™ and
QuickStart Plus development systems featuring low cost software
and hardware development tools. A functional block diagram of
the ADuC831 is shown above with a more detailed block diagram
shown in Figure 1.
The part is specified for 3 V and 5 V operation over the extended
industrial temperature range, and is available in a 52-lead plastic
FUNCTIONAL BLOCK DIAGRAM
MicroConverter, 12-Bit ADCs and DACs
with Embedded 62 kBytes Flash MCU
ADuC831
TABLE OF CONTENTS
FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . .1
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . .7
ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . .7
PIN CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . .8
PIN FUNCTION DESCRIPTIONS . . . . . . . . . . . . . . . .9
TERMINOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
TYPICAL PERFORMANCE CHARACTERISTICS . .11
MEMORY ORGANIZATION . . . . . . . . . . . . . . . . . . .14
OVERVIEW OF MCU-RELATED SFRS . . . . . . . . . .15
Accumulator SFR (ACC) . . . . . . . . . . . . . . . . . . . . . . . . .15
B SFR (B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Stack Pointer SFR (SP AND SPH) . . . . . . . . . . . . . . . . .15
Data Pointer (DPTR) . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Program Status Word SFR (PSW) . . . . . . . . . . . . . . . . . .16
Power Control SFR (PCON) . . . . . . . . . . . . . . . . . . . . . .16
SPECIAL FUNCTION REGISTERS . . . . . . . . . . . . . .17
ADC CIRCUIT INFORMATION . . . . . . . . . . . . . . . .18
General Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
ADC Transfer Function . . . . . . . . . . . . . . . . . . . . . . . . . .18
Typical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
ADCCON1 – (ADC Control SFR #1) . . . . . . . . . . . . . .19
ADCCON2 – (ADC Control SFR #2) . . . . . . . . . . . . . .20
ADCCON3 – (ADC Control SFR #3) . . . . . . . . . . . . . .21
Driving the A/D Converter . . . . . . . . . . . . . . . . . . . . . . . .22
Voltage Reference Connections . . . . . . . . . . . . . . . . . . . .23
Configuring the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
ADC DMA Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Micro Operation during ADC DMA Mode . . . . . . . . . . .25
ADC Offset and Gain Calibration Coefficients . . . . . . . .25
Calibrating the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
NONVOLATILE FLASH MEMORY . . . . . . . . . . . . . .27
Flash Memory Overview . . . . . . . . . . . . . . . . . . . . . . . . .27
Flash/EE Memory and the ADuC831 . . . . . . . . . . . . . . .27
ADuC831 Flash/EE Memory Reliability . . . . . . . . . . . . .27
Using the Flash/EE Program Memory . . . . . . . . . . . . . . .28
ULOAD Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Flash/EE Program Memory Security . . . . . . . . . . . . . . . .28
Using the Flash/EE Data Memory . . . . . . . . . . . . . . . . . .29
ECON—Flash/EE Memory Control SFR . . . . . . . . . . . .29
Flash/EE Memory Timing . . . . . . . . . . . . . . . . . . . . . . . .30
ADuC831 CONFIGURATION REGISTER (CFG831) . .31
USER INTERFACE TO OTHER ON-CHIP
ADuC831 PERIPHERALS . . . . . . . . . . . . . . . . . . . . .32
Using the DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Pulsewidth Modulator (PWM) . . . . . . . . . . . . . . . . . . . . .35
Serial Peripheral Interface . . . . . . . . . . . . . . . . . . . . . . . .382C Compatible Interface . . . . . . . . . . . . . . . . . . . . . . . . .40
Dual Data Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Power Supply Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Timer Interval Counter . . . . . . . . . . . . . . . . . . . . . . . . . .45
8052 COMPATIBLE ON-CHIP PERIPHERALS . . . .47
Parallel I/O Ports 0–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Timers/Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
UART Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . .55
UART Serial Port Control Register . . . . . . . . . . . . . . . . .55
UART Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . .56
UART Serial Port Baud Rate Generation . . . . . . . . . . . .56
Timer 1 Generated Baud Rates . . . . . . . . . . . . . . . . . . . .57
Timer 2 Generated Baud Rates . . . . . . . . . . . . . . . . . . . .57
Timer 3 Generated Baud Rates . . . . . . . . . . . . . . . . . . . .58
Interrupt System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
ADuC831 HARDWARE DESIGN CONSIDERATIONS 60
Clock Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
External Memory Interface . . . . . . . . . . . . . . . . . . . . . . .60
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Power Saving Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Power-On Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Grounding and Board Layout Recommendations . . . . . .63
OTHER HARDWARE CONSIDERATIONS . . . . . . . .63
In-Circuit Serial Download Access . . . . . . . . . . . . . . . . .63
Embedded Serial Port Debugger . . . . . . . . . . . . . . . . . . .64
Single-Pin Emulation Mode . . . . . . . . . . . . . . . . . . . . . . .64
Typical System Configuration . . . . . . . . . . . . . . . . . . . . .64
DEVELOPMENT TOOLS . . . . . . . . . . . . . . . . . . . . . .65
TIMING SPECIFICATIONS . . . . . . . . . . . . . . . . . . . .66
OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . .76
(AVDD = DVDD = 2.7 V to 3.3 V or 4.5 V to 5.5 V. VREF = 2.5 V Internal Reference, MCLKIN = 16 MHz,
all specifications TA = TMIN to TMAX, unless otherwise noted.)SPECIFICATIONS1
ADuC831
ADuC831
SPECIFICATIONS (continued)
ADuC831SCLOCK and RESET Only
START UP TIME
