REV. 0
ADuC832
MicroConverter
®
, 12-Bit ADCs and DACs
with Embedded 62 kBytes Flash MCU
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2002. All rights reserved.
MicroConverter is a registered trademark and QuickStart is a trademark
of Analog Devices, Inc.
SPI is a registered trademark of Motorola, Inc.
I
2
C is a registered trademark of Philips Corporation.
FEATURES
ANALOG I/O
8-Channel, 247 kSPS 12-Bit ADC
DC Performance: H115501 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/H9018-H9004 DACs
On-Chip Temperature Sensor Function H115503H11543C
On-Chip Voltage Reference
Memory
62 kBytes On-Chip Flash/EE Program Memory
4 kBytes On-Chip Flash/EE Data Memory
Flash/EE, 100 Yr Retention, 100 kCycles Endurance
2304 Bytes On-Chip Data RAM
8051-Based Core
8051 Compatible Instruction Set (16 MHz Max)
32 kHz Ext Crystal, On-Chip Programmable PLL
12 Interrupt Sources, 2 Priority Levels
Dual Data Pointer
Extended 11-Bit Stack Pointer
On-Chip Peripherals
Time Interval Counter (TIC)
UART, I
2
C
®
, and SPI
®
Serial I/O
Watchdog Timer (WDT), Power Supply Monitor (PSM)
Power
Specified for 3 V and 5 V Operation
Normal, Idle, and Power-Down Modes
Power-Down: 25 H9262A @ 3 V with Wake-Up cct Running
APPLICATIONS
Optical Networking—Laser Power Control
Base Station Systems
Precision Instrumentation, Smart Sensors
Transient Capture Systems
DAS and Communications Systems
Upgrade to ADuC812 Systems. Runs from 32 kHz
External Crystal with On-Chip PLL.
Also Available: ADuC831 Pin Compatible Upgrade to
Existing ADuC812 Systems that Require Additional
Code or Data Memory. Runs from 1 MHz–16 MHz
External Crystal.
FUNCTIONAL BLOCK DIAGRAM
62 kBYTES FLASH/EE PROGRAM MEMORY
4 kBYTES FLASH/EE DATA MEMORY
2304 BYTES USER RAM
3 H11547 16 BIT TIMERS
1 H11547 REAL TIME CLOCK
4H11547 PARALLEL
PORTS
8051-BASED MCU WITH ADDITIONAL
PERIPHERALS
ADuC832
XTAL2XTAL1
TEMP
SENSOR
V
REF
INTERNAL
BAND GAP
VREF
ADC0
ADC1
ADC5
ADC6
ADC7
OSC
12-BIT
DAC
DAC
PWM0
T/H
MUX
12-BIT ADC
HARDWARE
CALIBRATON
BUF
DACBUF
PWM1
12-BIT
DAC
16-BIT
H9018–H9004 DAC
16-BIT
H9018–H9004 DAC
16-BIT
PWM
16-BIT
PWM
POWER SUPPLY MON
WATCHDOG TIMER
UART, I
2
C, AND SPI
SERIAL I/O
MUX
PLL
GENERAL DESCRIPTION
The ADuC832 is a complete smart transducer front end, integrat-
ing a high performance self-calibrating multichannel 12-bit ADC,
dual 12-bit DACs, and programmable 8-bit MCU on a single chip.
The device operates from a 32 kHz crystal with an on-chip PLL
generating a high frequency clock of 16.77 MHz. This clock is, in
turn, 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, 256 bytes RAM,
and 2 kBytes of extended RAM are also integrated on-chip.
The ADuC832 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 H9018-H9004
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 (SPI, I
2
C, 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 ADuC832 is supported by QuickStart™ and
QuickStart Plus development systems featuring low cost software
and hardware development tools. A functional block diagram of
the ADuC832 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
quad flatpack package and a 56-lead chip scale package.