AT89C5131A-RDTIL datasheet(183/186 Pages) ATMEL

183 / 186 page

183

AT89C5131A-L

4338F–USB–08/07

Flash Programming and Erasure........................................................................ 43

Boot Process ...................................................................................................... 44

Application-Programming-Interface .................................................................... 45

XROW Bytes....................................................................................................... 45

Hardware Conditions .......................................................................................... 45

On-chip Expanded RAM (ERAM) ....................................................... 47

Timer 2 ................................................................................................. 50

Auto-reload Mode ............................................................................................... 50

Programmable Clock Output .............................................................................. 51

Programmable Counter Array (PCA) ................................................ 55

PCA Capture Mode............................................................................................. 62

16-bit Software Timer/Compare Mode................................................................ 62

High Speed Output Mode ................................................................................... 63

Pulse Width Modulator Mode.............................................................................. 64

PCA Watchdog Timer ......................................................................................... 65

Serial I/O Port ...................................................................................... 66

Framing Error Detection ..................................................................................... 66

Automatic Address Recognition.......................................................................... 67

Baud Rate Selection for UART for Mode 1 and 3............................................... 69

UART Registers.................................................................................................. 72

Interrupt System ................................................................................. 76

Overview............................................................................................................. 76

Registers............................................................................................................. 77

Interrupt Sources and Vector Addresses............................................................ 84

Keyboard Interface ............................................................................. 85

Introduction ......................................................................................................... 85

Description.......................................................................................................... 85

Registers............................................................................................................. 86

Programmable LED ............................................................................ 89

Serial Peripheral Interface (SPI) ........................................................ 90

Features.............................................................................................................. 90

Signal Description............................................................................................... 90

Functional Description ........................................................................................ 92

Two Wire Interface (TWI) .................................................................... 99

Description........................................................................................................ 101

Notes ................................................................................................................ 104

Registers........................................................................................................... 114

AT89C5131A-RDTIL Datenblatt(PDF) 183 Page - ATMEL Corporation