ADUC7122_14 Datasheet, PDF (1/96 Pages) Analog Devices – Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU

Data Sheet
Precision Analog Microcontroller, 12-Bit
Analog I/O, ARM7TDMI MCU
ADuC7122
FEATURES
Analog I/O
13-external channel, 12-bit, 1 MSPS ADC
2 differential channels with programmable gain
PGA (1 to 5) input range
IOVDD power monitor channel
On-chip temperature monitor
11 general-purpose inputs
Fully differential and single-ended modes
0 V to VREF analog input range
12 × 12-bit voltage output DACs
On-chip voltage reference: 1.2 V/2.5 V
Buffered output reference sources for use with external
circuits
Microcontroller
ARM7TDMI core, 16-bit/32-bit RISC architecture
JTAG port supports code download and debug
Clocking options
Trimmed on-chip oscillator (±3%)
External watch crystal
External clock source up to 41.78 MHz
41.78 MHz PLL with programmable divider
Memory
126 kB Flash/EE memory, 8 kB SRAM
In-circuit download, JTAG-based debug
Software-triggered in-circuit reprogrammability
On-chip peripherals
UART, 2× I²C and SPI serial I/Os
32-pin GPIO port
4 general-purpose timers
Wake-up and watchdog timers (WDT)
Power supply monitor
Vectored interrupt controller for FIQ and IRQ
8 priority levels for each interrupt type
Interrupt on edge or level external pin inputs
Power
Specified for 3 V operation
Active mode: 11 mA at 5 MHz, 40 mA at 41.78 MHz
Packages and temperature range
7 mm × 7 mm 108-ball BGA
Fully specified for −10°C to +95°C operation
Tools
Low cost QuickStart development system
Full third-party support
APPLICATIONS
Optical networking, industrial control, and automation
systems
Smart sensors and precision instrumentation
FUNCTIONAL BLOCK DIAGRAM
AVDD 3.3V AGND DAC0 DAC1 DAC2 DAC3 DAC4 DAC5 DAC6 DAC7 DAC8
PADC0
PGA
PADC1
PGA
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
ADC9
ADC10
TEMPERATURE ^{IOVDD MON}
SENSOR
INTERNAL
REFERENCE
BUF
V_REF_1.2 V_REF_2.5
DAC BUF
DAC9
DAC BUF
DAC10
1MSPS
12-BIT
SAR ADC
ADuC7122
DAC BUF
PLA
OSC
PLL
POR
PWM
WAKE-UP
TIMER
WD
TIMER
VIC
3× GP
TIMERS
126k
FLASH
(63k ×
16-BIT)
8k SRAM
(2k × 32-BIT)
ARM7
TDMI
LDO
UART
JTAG
GPIO
CONTROL
SPI
1²C × 2
P0.0 TO P0.7
P1.0 TO P1.7
Figure 1.
P2.0 TO P2.7
P3.0 TO P3.7
DAC11
IOVDD
IOGND
XTALI
XTALO
RST
TDO
TDI
TCK
TMS
TRST
Rev. A
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