Oki ML490 Series, Руководство по обслуживанию

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42114101 Rev.1
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.
;
;
;
;;
;;
;
;
;
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
Write cycle timing (WRITE)
Read cycle timing (READ)