AT90LS4433-4AI datasheet(123/126 Pages) ATMEL

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AT90S/LS4433

1042H–AVR–04/03

Table of Contents

Features................................................................................................. 1

Pin Configurations................................................................................ 2

Description ............................................................................................ 3

Block Diagram ...................................................................................................... 4

Pin Descriptions.................................................................................................... 5

Clock Options ....................................................................................................... 6

Architectural Overview......................................................................... 7

General Purpose Register File ........................................................................... 10

ALU – Arithmetic Logic Unit................................................................................ 11

In-System Programmable Flash Program Memory ............................................ 11

SRAM Data Memory........................................................................................... 11

Program and Data Addressing Modes................................................................ 12

EEPROM Data Memory...................................................................................... 16

Memory Access Times and Instruction Execution Timing .................................. 16

I/O Memory ......................................................................................................... 17

Reset and Interrupt Handling.............................................................................. 20

Sleep Modes....................................................................................................... 31

Timer/Counters ................................................................................... 33

Timer/Counter Prescaler..................................................................................... 33

8-bit Timer/Counter0........................................................................................... 33

16-bit Timer/Counter1......................................................................... 35

Watchdog Timer.................................................................................. 43

EEPROM Read/Write Access ............................................................. 45

Prevent EEPROM Corruption ............................................................................. 47

Serial Peripheral Interface – SPI........................................................ 48

SS Pin Functionality............................................................................................ 49

Data Modes ........................................................................................................ 50

UART.................................................................................................... 53

Data Transmission.............................................................................................. 53

Data Reception ................................................................................................... 54

UART Control ..................................................................................................... 57

Analog Comparator ............................................................................ 62

AT90LS4433-4AI Datasheet(PDF) 123 Page - ATMEL Corporation