Epson LQ 1050 - B/W Dot-matrix Printer - Page 200

REV.-A
Figure A-9 shows the gate array block diagram and Table A-9 lists the gate array ports function.
DB7
I
ma
P~7
PAO
Ip-1
INO
I I
!
D7
I
Multiplexed B1-dlrectlan SW data bus
DO
I ; %
euffer
-l
Data
.Su&scrlpt
latch
Generatar
*b==I=!
1
J
Data
latch
ltallc
chaacter
Oeneratar
I
AO
Al
A2
OOWR
I
07WR
*
auffer
Data
latch
I=Eli
auffer
Data
latch
L
“1=
aufter
Data
latch
L
T
\
La@c
RXDIN~
Gate Array Internal Reed
RSTIN1
t
RSTIN2
P?
PO
Pf
PC
P$l
PO
AC
au
ml
PE
RX
RS”
,+’,
.$
i,.,
Figure A-9. GA E05A16GA Internal Block Diagram
A-1 4