ADUC812BS
MicroConverter㈢, Multichannel 12-Bit ADC with Embedded Flash MCU

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Datasheet

Size: 1190.16KB
Page: 60
PDF: ADuC812BS.pdf
  • Description:
    MicroConverter㈢, Multichannel 12-Bit ADC with Embedded Flash MCU
  • MFG:
    AD [Analog Devices]
 

Abstract


a
ADuC812
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 ? 2003 Analog Devices, Inc. All rights reserved.
REV. E
MicroConverter
?
, Multichannel
12-Bit ADC with Embedded Flash MCU
FUNCTIONAL BLOCK DIAGRAM
MICROCONTROLLER
8051 BASED
MICROCONTROLLER CORE
POWER SUPPLY
MONITOR
WATCHDOG
TIMER
640 H11547 8 USER
FLASH EEPROM
256 H11547 8 USER
RAM
SPI
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
ADC
CONTROL
AND
CALIBRATION
LOGIC
T/H
TEMP
SENSOR
2.5V
REF
AIN
MUX
BUFDAC0
MOSI/
SDATA
MISO
(P3.3)
SCLOCKTxD
(P3.1)
RxD
(P3.0)
XTAL2XTAL1DGNDDV
DD
AGNDAV
DD
DAC0
DAC1
T0 (P3.4)
T1 (P3.5)
T2 (P1.0)
T2EX (P1.1)
INT0 (P3.2)
INT1 (P3.3)
ALE
PSEN
EA
RESET
ADuC812
P3.0–P3.7P2.0–P2.7P1.0–P1.7P0.0–P0.7
AIN0 (P1.0)–AIN7 (P1.7)
V
REF
UART
8K H11547 8 PROGRAM
FLASH EEPROM
DAC
CONTROL
3 H11547 16-BIT
TIMER/COUNTERS
OSC
MUX
DAC1 BUF
C
REF
BUF
2-WIRE
SERIAL I/O
FEATURES
Analog I/O
8-Channel, High Accuracy 12-Bit ADC
On-Chip, 100 ppm/H11543C Voltage Reference
High Speed 200 kSPS
DMA Controller for High Speed ADC-to-RAM Capture
2 12-Bit Voltage Output DACs
On-Chip Temperature Sensor Function
Memory
8K Bytes On-Chip Flash/EE Program Memory
640 Bytes On-Chip Flash/EE Data Memory
256 Bytes On-Chip Data RAM
16M Bytes External Data Address Space
64K Bytes External Program Address Space
8051 Compatible Core
12 MHz Nominal Operation (16 MHz Max)
3 16-Bit Timer/Counters
High Current Drive Capability—Port 3
9 Interrupt Sources, 2 Priority Levels
Power
Specified for 3 V and 5 V Operation
Normal, Idle, and Power-Down Modes
On-Chip Peripherals
UART and SPI
?
Serial I/O
2-Wire (400 kHz I
2
C
?
Compatible) Serial I/O
Watchdog Timer
Power Supply Monitor
APPLICATIONS
Intelligent Sensors Calibration and Conditioning
Battery-Powered Systems (Portable PCs, Instruments,
Monitors)
Transient Capture Systems
DAS and Communications Systems
Control Loop Monitors (Optical Networks/Base Stations)
GENERAL DESCRIPTION
The ADuC812 is a fully integrated 12-bit data acquisition system
incorporating a high performance self-calibrating multichannel
ADC, dual DAC, and programmable 8-bit MCU (8051 instruc-
tion set compatible) on a single chip.
The programmable 8051 compatible core is supported by 8K
bytes Flash/EE program memory, 640 bytes Flash/EE data
memory, and 256 bytes data SRAM on-chip.
Additional MCU support functions include Watchdog Timer,
Power Supply Monitor, and ADC DMA functions. Thirty-two
programmable I/O lines, I
2
C compatible SPI and Standard
UART Serial Port I/O are provided for multiprocessor interfaces
and I/O expansion.
Normal, idle, and power-down operating modes for both the
MCU core and analog converters allow flexible power manage-
ment schemes suited to low power applications. The part is
specified for 3 V and 5 V operation over the industrial tem-
perature range and is available in a 52-lead, plastic quad
flatpack package, and in a 56-lead, chip scale package.

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