Sharp FACSIMILE FO-4500 Service Manual page 107

LH28F800SUT (IC6)
INPUT
A0 ~ 20
BUFFER
ADDRESS
QUEUE
LATCHE
ADDRESS
COUNTER
DQ8 ~ 15
OUTPUT
BUFFER
Y-DECODER
X-DECODER
DQ0 ~ 7
OUTPUT
BUFFER BUFFER
QUEUE
REGISTER
ID
REGISTER
CSR
ESRs
DATA
COMPARATER
Y GATING/SENSING
Fig. 5
5 – 17
INPUT INPUT
BUFFER
DATA
PAGE
BUFFERS
FO-4500H
3/5#
I/O
LOGIC
BYTE#
CE0#
CE1#
OE#
WE#
WP#
RP#
RY/BY#
PROGRAM/
VPP
ERASE
VOLTAGE
3/5#
SWITCH
VCC
GND