User eeprom – IBM CMX58886CX User Manual
Page 81
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BDM-610000050
Rev A
Chapter 4: Using the cpuModule
73
User EEPROM
A 512kB serial EEPROM (Atmel AT93C66) is available on the cpuModule for the user to save nonvolatile
parameters on the cpuModule. The EEPROM can be accessed by reading and writting to I/O address 456h, as
shown in the following table.
Table 55
User EEPROM I/O Address 456h
D7
D6
D5
D4
D3
D2
D1
D0
CS
SK
DI
DO
Reserved
(Multi-Color LED)
Table 56
EEPROM Register Description
Bit
Signal
Function
Read / Write
D7
CS
Chip Select
Read / Write
D6
SK
Serial Data Clock
Read / Write
D5
DI
Serial Data Input
Read / Write
D4
DO
Serial Data Output
Read Only
D3
Reserved
D2
(Multi-Color LED)
D1
(Multi-Color LED)
D0
(Multi-Color LED)
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