Oki ML421 Maintenance Manual - Page 14

The EEPROM contains menu data.

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Oki Data CONFIDENTIAL (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. MPU P24 P27 P25 P26 EEDIN-P EECS-P EEDOUT-P EECLK-P EEPROM D1 CS DO SK PRE = O PE = X EECS-P t CS EECLK-P EEDIN-P Start Operation code code Address 1 10 A5 A0 EEDOUT-P 0 D15 D0 D15 D0 D15 Read cycle timing (READ) PRE = O PE EECS-P t CS EECLK-P EEDIN-P Start Operation code code Address Data 10 1 A5 A0 D15 D0 EEDOUT-P Bus twp Ready Write cycle timing (WRITE) 42113901 Rev.2 14 /

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42113901
Rev.2
14 /
Oki
Data
CONFIDENTIAL
MPU
EEPROM
EEDIN-P
EECS-P
EEDOUT-P
EECLK-P
P24
P27
P25
P26
D1
CS
DO
SK
Ready
Bus
twp
D0
D15
A0
A5
1
1
0
Start
code
Operation
code
Address
Data
t
CS
PRE = O
PE
EECS-P
EECLK-P
EEDIN-P
EEDOUT-P
Address
Start
code
Operation
code
EEDOUT-P
EEDIN-P
EECLK-P
EECS-P
D15
D0
D15
D0
D15
0
A0
A5
0
1
1
t
CS
PRE = O
PE = X
(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.
Read cycle timing (READ)
Write cycle timing (WRITE)