ARM ARM DUI 0224I manual Eeprom contents

Memory Expansion Boards

E.3 EEPROM contents

There are three serial devices on the PB926EJ-S serial bus:

•Dynamic Memory Expansion EEPROM at 0xA0 for write, 0xA1 for read

•Static Memory Expansion EEPROM at 0xA2 for write, 0xA3 for read

•Real Time Clock (Time of Year) at 0xD0 for write, 0xD1 for read

See Serial bus interface on page 4-86 for details on the serial bus interface.

Both memory Expansion Proems are 256 bytes in size and have a similar structure:

•Static Memory Expansion EEPROM contains 5 chip select information blocks, a manufacturer string and a checksum.

•Dynamic Memory Expansion EEPROM contains 3 chip select information blocks, a manufacturer string and a checksum.

Each chip select information block contains details about the memory devices accessed with the corresponding chip select signal. The organization of a chip select information block is listed in table Table E-2 on page E-7.

Note

Table E-2 on page E-7 organization and the examples given are valid for all pre-v1.0 PISMO compliant memory expansion boards. For v1.0 onwards please check the latest PISMO specification at www.pismoworld.org

E-6 Copyright © 2003-2010 ARM Limited. All rights reserved. ARM DUI 0224I