AT91M40800_1 Datasheet, PDF (149/153 Pages) ATMEL Corporation – AT91 ARM Thumb Microcontrollers

Table of Contents
1354D–ATARM–05/02
AT91X40 Series
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
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