ADUC7121 Analog Devices, ADUC7121 Datasheet - Page 2

• Manufacturer Part Number: ADUC7121
• Description: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU
• Manufacturer: Analog Devices

Specifications of ADUC7121

• Mcu Core: ARM7 TDMI
• Mcu Speed (mips): 40
• Sram (bytes): 8192Bytes
• Gpio Pins: 32
• Adc # Channels: 9

ADuC7121
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description ......................................................................... 4
Specifications..................................................................................... 5
Absolute Maximum Ratings.......................................................... 15
Pin Configuration and Function Descriptions........................... 16
Terminology .................................................................................... 20
Overview of the ARM7TDMI Core............................................. 21
Memory Organization ................................................................... 23
ADC Circuit Overview .................................................................. 27
Nonvolatile Flash/EE Memory ..................................................... 35
Timing Specifications ................................................................ 10
ESD Caution................................................................................ 15
ADC Specifications .................................................................... 20
DAC Specifications..................................................................... 20
Thumb Mode (T)........................................................................ 21
Long Multiply (M)...................................................................... 21
EmbeddedICE (I) ....................................................................... 21
Exceptions ................................................................................... 21
ARM Registers ............................................................................ 22
Interrupt Latency........................................................................ 22
Memory Access........................................................................... 23
Flash/EE Memory....................................................................... 23
SRAM ........................................................................................... 23
Memory Mapped Registers ....................................................... 23
Complete MMR Listing............................................................. 24
ADC Transfer Function............................................................. 27
Temperature Sensor ................................................................... 29
Converter Operation.................................................................. 31
Driving the Analog Inputs ........................................................ 33
Band Gap Reference................................................................... 33
Power Supply Monitor ............................................................... 34
Flash/EE Memory Overview..................................................... 35
Flash/EE Memory....................................................................... 35
Flash/EE Memory Security ....................................................... 35
Flash/EE Control Interface........................................................ 36
Execution Time from SRAM and FLASH/EE ........................ 39
Reset and Remap ........................................................................ 39
Rev. 0 | Page 2 of 96
Other Analog Peripherals.............................................................. 41
Digital Peripherals.......................................................................... 50
General-Purpose Input/Output.................................................... 53
UART Serial Interface .................................................................... 58
I
Serial Peripheral Interface ............................................................. 73
Programmable Logic Array (PLA)............................................... 76
Interrupt System ............................................................................. 80
Timers .............................................................................................. 87
Outline Dimensions ....................................................................... 95
2
C Peripherals ................................................................................ 63
Digital-to-Analog Converters................................................... 41
LDO (Low Dropout Regulator)................................................ 43
Current Output DACs (IDAC)................................................. 43
IDAC MMRs ............................................................................... 45
Oscillator and PLL—Power Control........................................ 46
PWM General Overview........................................................... 50
PWM Convert Start Control .................................................... 52
Baud Rate Generation................................................................ 58
UART Register Definition......................................................... 58
Serial Clock Generation ............................................................ 63
I
I
I
SPI MISO (Master In, Slave Out) Pin...................................... 73
SPI MOSI (Master Out, Slave In) Pin...................................... 73
SPICLK (Serial Clock I/O) Pin................................................. 73
SPI Chip Select Input Pin .......................................................... 73
Configuring External Pins for SPI Functionality................... 73
SPI Registers................................................................................ 73
PLA MMRs Interface................................................................. 77
Normal Interrupt Request (IRQ) ............................................. 80
Fast Interrupt Request (FIQ) .................................................... 81
External Interrupts (IRQ0 to IRQ3) ........................................ 85
Timer0—Lifetime Timer........................................................... 87
Timer1—General-Purpose Timer ........................................... 88
Timer2—Wake-Up Timer......................................................... 90
Timer3—Watchdog Timer........................................................ 91
Timer4—General-Purpose Timer ........................................... 93
Ordering Guide .......................................................................... 95
2
2
2
C Bus Addresses....................................................................... 63
C Registers ................................................................................ 64
C Common Registers .............................................................. 72