Oki ML420 Maintenance Manual page 14

(5) EEPROM
The EEPROM is a CMOS serial I/O type memory which is capable of electrically erasing
and writing 1,024 bits.
The EEPROM contains menu data.
The following shows the memory access operation.
PRE = O
PE = X
EECS-P
EECLK-P
EEDIN-P
EEDOUT-P
PRE = O
PE
EECS-P
EECLK-P
EEDIN-P
EEDOUT-P
42113901TH01 Rev.3
MPU
EEDIN-P
P24
EECS-P
P27
EEDOUT-P
P25
EECLK-P
P26
Operation
Start
Address
code
code
0
1 1
A5 A0
Read cycle timing (READ)
Operation
Start Address
code
code
0 A5 A0
1 1
Write cycle timing (WRITE)
EEPROM
D1
CS
DO
SK
0
D15 D0 D15 D0
t
CS
Data
D15 D0
Bus
twp
Oki Data CONFIDENTIAL
t
CS
D15
Ready
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