ADuC7124
TABLE OF CONTENTS
Features .............................................................................................. 1
Band Gap Reference................................................................... 36
Nonvolatile Flash/EE Memory ..................................................... 37
Programming.............................................................................. 37
Flash/EE Memory Security ....................................................... 38
Flash/EE Control Interface ....................................................... 38
Execution Time from SRAM and Flash/EE............................ 41
Reset and Remap........................................................................ 41
Other Analog Peripherals.............................................................. 44
DAC.............................................................................................. 44
Power Supply Monitor............................................................... 45
Comparator................................................................................. 46
Oscillator and PLL—Power Control........................................ 47
Digital Peripheral ........................................................................... 51
General-Purpose Input/Output................................................ 51
Serial Port Mux........................................................................... 53
UART Serial Interface................................................................ 53
Serial Peripheral Interface......................................................... 59
I2C................................................................................................. 63
PWM General Overview........................................................... 71
Programmable Logic Array (PLA)........................................... 74
Processor Reference Peripherals................................................... 77
Interrupt System......................................................................... 77
IRQ ............................................................................................... 77
Fast Interrupt Request (FIQ) .................................................... 78
Vectored Interrupt Controller (VIC)....................................... 79
Timers.......................................................................................... 84
Hardware Design Considerations ................................................ 90
Power Supplies............................................................................ 90
Grounding and Board Layout Recommendations................. 91
Clock Oscillator.......................................................................... 91
Power-on Reset Operation........................................................ 92
Outline Dimensions....................................................................... 93
Ordering Guide .......................................................................... 93
Applications....................................................................................... 1
Revision History ............................................................................... 2
General Description ......................................................................... 3
Detailed Block Diagram .............................................................. 3
Specifications..................................................................................... 4
Timing Specifications .................................................................. 8
Absolute Maximum Ratings.......................................................... 12
ESD Caution................................................................................ 12
Pin Configuration and Function Descriptions........................... 13
Typical Performance Characteristics ........................................... 16
Terminology .................................................................................... 19
ADC Specifications .................................................................... 19
DAC Specifications..................................................................... 19
Overview of the ARM7TDMI Core............................................. 20
Thumb Mode (T)........................................................................ 20
Long Multiply (M)...................................................................... 20
EmbeddedICE (I) ....................................................................... 20
Exceptions ................................................................................... 20
ARM Registers ............................................................................ 20
Interrupt Latency........................................................................ 21
Memory Organization ................................................................... 22
Memory Access........................................................................... 22
Flash/EE Memory....................................................................... 22
SRAM........................................................................................... 22
Memory Mapped Registers....................................................... 22
ADC Circuit Overview .................................................................. 30
Transfer Function ....................................................................... 30
Typical Operation ....................................................................... 31
MMRs Interface.......................................................................... 31
Converter Operation.................................................................. 33
Driving the Analog Inputs ........................................................ 34
Calibration................................................................................... 35
Temperature Sensor ................................................................... 35
REVISION HISTORY
7/10—Revision 0: Initial Version
Rev. 0 | Page 2 of 96