Epson PX-8 - Page 296

REV.-A
GAH40M
1 . Location: MAPLE Board, 4C
2. Pin
assignments
Note: Pins 25 and 59 are cut.
Table 7-9 GAH40M Pin Assignments
Pin No. Signal Name
In/Out
Function
1 DB6
In/Out
Data bus 6
2
DB1
In/Out
Data bus 1
-
3 IR Out
Indicates
that data is being output according
to main CPU instruction (RS-232C ~ main
CPU).
4 DBO
In/Out
Data bus 0
5
DB2
In/Out Data bus 2
--
6 CSOE Out SED1320 chip select signal
-
7
RS In Reset input: Supplied from GAH40D.
-
8
IW
Out Indicates that data is being input according
to main CPU instruction (main CPU ~
RS-232C).
9
N/C
-
Not used.
10
TXC
Out
Baud rate control clock (for RS-232C).
7-25