ADUC812_15 Datasheet, PDF (1/57 Pages) Analog Devices – MicroConverter, Multichannel 12-Bit ADC with Embedded Flash MCU

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MicroConverter^®, Multichannel
12-Bit ADC with Embedded Flash MCU
ADuC812
FEATURES
Analog I/O
8-Channel, High Accuracy 12-Bit ADC
On-Chip, 100 ppm/؇C 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 I²C^® 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, I²C 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.
FUNCTIONAL BLOCK DIAGRAM
P0.0–P0.7
P1.0–P1.7
P2.0–P2.7
P3.0–P3.7
AIN0 (P1.0)–AIN7 (P1.7)
V_REF
C_REF
AIN
MUX
T/H
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
ADC
CONTROL
AND
CALIBRATION
LOGIC
DAC
CONTROL
DAC0
BUF
DAC1
BUF
2.5V
REF
TEMP
SENSOR
BUF
ADuC812
8051 BASED
MICROCONTROLLER CORE
8K ؋ 8 PROGRAM
FLASH EEPROM
640 ؋ 8 USER
FLASH EEPROM
256 ؋ 8 USER
RAM
MICROCONTROLLER
POWER SUPPLY
MONITOR
WATCHDOG
TIMER
UART
OSC
3 ؋ 16-BIT
TIMER/COUNTERS
2-WIRE
SERIAL I/O
SPI
MUX
AV_DD AGND DV_DD DGND
XTAL1 XTAL2 RxD TxD SCLOCK MOSI/ MISO
(P3.0) (P3.1)
SDATA (P3.3)
DAC0
DAC1
T0 (P3.4)
T1 (P3.5)
T2 (P1.0)
T2EX (P1.1)
INT0 (P3.2)
INT1 (P3.3)
ALE
PSEN
EA
RESET
REV. F
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