ADuC7121 Datasheet PDF - Analog Devices

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ADuC7121
Analog Devices

Part Number ADuC7121
Description Precision Analog Microcontroller 12-Bit Analog I/O ARM7TDMI MCU
Page 30 Pages


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Precision Analog Microcontroller, 12-Bit
Analog I/O, ARM7TDMI MCU
ADuC7121
FEATURES
Software-triggered in-circuit reprogrammability
Analog input/output
9-channel, 12-bit, 1 MSPS ADC
2 differential pairs with input PGA
7 general-purpose inputs (differential or single-ended)
Fully differential and single-ended modes
0 V to VREF analog input range
5 low noise current digital-to-analog converters (IDACs)
250 mA, 200 mA, 80 mA, 45 mA, 20 mA
4 × 12-bit voltage output DACs
On-chip voltage reference
On-chip temperature sensor
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
On-chip peripherals
UART, 2 × I2C and SPI serial I/O
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 CSP_BGA
Fully specified for –10°C to +95°C operation
Tools
Low cost QuickStart development system
Full third party support
41.78 MHz PLL with programmable divider
Memory
126 kB flash/EE memory, 8 kB SRAM
APPLICATIONS
Optical modules—tunable laser
In-circuit download, JTAG-based debug
FUNCTIONAL BLOCK DIAGRAM
AVDD 3.3V AGND
DAC0 DAC1 DAC2 DAC3
IDAC0 IDAC1 IDAC2 IDAC3 IDAC4
PADC0N
PADC0P
PADC1N
PADC1P
ADC4
ADC5
ADC6
ADC7
ADC8
ADC9
ADC10/AINCM
PGA
PGA
TEMPERATURE
SENSOR
ADuC7121
1MSPS
12-BIT
SAR ADC
OSC
WAKE-UP
TIMER
WD
TIMER
VIC
PLA
PLL
POR
PWM
3× GP
TIMERS
126kB
FLASH
(63k ×
16-BIT)
8kB SRAM
(2k × 32-BIT) LDO
ARM7
TDMI
UART
JTAG
GPIO
CONTROL
SPI
I2C × 2
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INTERNAL
REFERENCE
BUF
VREF_1.2 VREF_2.5
P0.0 TO P0.7
P1.0 TO P1.7
Figure 1.
P2.0 TO P2.7
P3.0 TO P3.7
IOVDD
IOGND
XTALI
XTALO
RST
TDO
TDI
TCK
TMS
TRST
Rev. 0
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.

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