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E-6 Copyright © 2003-2007 ARM Limited. All rights reserved. ARM DUI 0224F
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