ARM ARM DUI 0224I E.3 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 TableE-2 on page E-7.

Note

TableE-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