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ADUC7121 Datasheet(PDF) 2 Page - Analog Devices |
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ADUC7121 Datasheet(HTML) 2 Page - Analog Devices |
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2 / 96 page  ADuC7121 Rev. 0 | Page 2 of 96 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 3 General Description ......................................................................... 4 Specifications..................................................................................... 5 Timing Specifications ................................................................ 10 Absolute Maximum Ratings.......................................................... 15 ESD Caution................................................................................ 15 Pin Configuration and Function Descriptions........................... 16 Terminology .................................................................................... 20 ADC Specifications .................................................................... 20 DAC Specifications..................................................................... 20 Overview of the ARM7TDMI Core............................................. 21 Thumb Mode (T)........................................................................ 21 Long Multiply (M)...................................................................... 21 EmbeddedICE (I) ....................................................................... 21 Exceptions ................................................................................... 21 ARM Registers ............................................................................ 22 Interrupt Latency........................................................................ 22 Memory Organization ................................................................... 23 Memory Access........................................................................... 23 Flash/EE Memory....................................................................... 23 SRAM ........................................................................................... 23 Memory Mapped Registers ....................................................... 23 Complete MMR Listing............................................................. 24 ADC Circuit Overview .................................................................. 27 ADC Transfer Function............................................................. 27 Temperature Sensor ................................................................... 29 Converter Operation.................................................................. 31 Driving the Analog Inputs ........................................................ 33 Band Gap Reference................................................................... 33 Power Supply Monitor ............................................................... 34 Nonvolatile Flash/EE Memory ..................................................... 35 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 Other Analog Peripherals.............................................................. 41 Digital-to-Analog Converters................................................... 41 LDO (Low Dropout Regulator)................................................ 43 Current Output DACs (IDAC)................................................. 43 IDAC MMRs ............................................................................... 45 Oscillator and PLL—Power Control........................................ 46 Digital Peripherals.......................................................................... 50 PWM General Overview........................................................... 50 PWM Convert Start Control .................................................... 52 General-Purpose Input/Output.................................................... 53 UART Serial Interface .................................................................... 58 Baud Rate Generation................................................................ 58 UART Register Definition......................................................... 58 I2C Peripherals ................................................................................ 63 Serial Clock Generation ............................................................ 63 I2C Bus Addresses....................................................................... 63 I2C Registers ................................................................................ 64 I2C Common Registers .............................................................. 72 Serial Peripheral Interface ............................................................. 73 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 Programmable Logic Array (PLA)............................................... 76 PLA MMRs Interface................................................................. 77 Interrupt System ............................................................................. 80 Normal Interrupt Request (IRQ) ............................................. 80 Fast Interrupt Request (FIQ) .................................................... 81 External Interrupts (IRQ0 to IRQ3) ........................................ 85 Timers .............................................................................................. 87 Timer0—Lifetime Timer........................................................... 87 Timer1—General-Purpose Timer ........................................... 88 Timer2—Wake-Up Timer......................................................... 90 Timer3—Watchdog Timer........................................................ 91 Timer4—General-Purpose Timer ........................................... 93 Outline Dimensions ....................................................................... 95 Ordering Guide .......................................................................... 95 |
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