Oki 3391 Printer User Manual


 
2 – 6
(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
ReadyBus
twp
D0D15A0A5
11
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
A0A5
0
11
t
CS
PRE = O
PE = X
Write cycle timing (WRITE)
Read cycle timing (READ)