AT91 datasheet(149/153 Pages) ATMEL

149 / 153 page

AT91X40 Series

1354D–ATARM–08/02

Table of Contents

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

Description ............................................................................................ 1

Pin Configuration.................................................................................. 2

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

Architectural Overview......................................................................... 5

Memories .............................................................................................................. 5

Peripherals............................................................................................................ 5

Associated Documentation ................................................................. 7

Product Overview ................................................................................. 8

Power Supply........................................................................................................ 8

Input/Output Considerations ................................................................................. 8

Master Clock......................................................................................................... 8

Reset .................................................................................................................... 8

Emulation Function ............................................................................................... 8

Memory Controller ................................................................................................ 9

External Bus Interface ........................................................................................ 11

Peripherals .......................................................................................... 11

System Peripherals............................................................................................. 12

User Peripherals ................................................................................................. 14

Memory Map........................................................................................ 15

Peripheral Memory Map ..................................................................... 17

EBI: External Bus Interface................................................................ 18

External Memory Mapping.................................................................................. 18

External Bus Interface Pin Description .............................................................. 20

Chip Select Lines................................................................................................ 21

Data Bus Width................................................................................................... 23

Byte Write or Byte Select Access ....................................................................... 24

Boot on NCS0..................................................................................................... 26

Read Protocols ................................................................................................... 27

Write Data Hold Time ......................................................................................... 28

Wait States ......................................................................................................... 29

Memory Access Waveforms ............................................................................... 33

EBI User Interface .............................................................................................. 45

EBI Chip Select Register .................................................................................... 46

EBI Remap Control Register .............................................................................. 48

EBI Memory Control Register ............................................................................. 49

AT91 Datasheet(PDF) 149 Page - ATMEL Corporation