Epson MX-80 Technical Manual page 17

(3) Connector CN3
(a) Use ................... This connector is used when connecting an optional P.C.
board to the MX-80.
(b) Number of pins ........ 26 pins
(c) Pin assignment ......... Refer to Table 2.3 below.
Table 2.3 Pin Assignment of eN3
Connector
Signal Name Description of Signal Direction
Pin No.
1 ERR Error Out
2 PE Paper End Out
3 D7 Data Bit 7 In
4
RDY (BUSY)
Ready
Out
5 D6 Data Bit 6 In
6 ACK
Acknowledge
Out
7
D5/PAR DIS
Data Bit 5/Parity Disable
In
8
INIT Initial
In
9 D4/0/E
Data Bit 4/0dd Parity Select/Even Parity
In
Select
10 STB Strobe
In
11 D8/S1 Data Bit 8/Serial Signal Input
In
12
+12
+12V AC Out
13 R Reset Out
14
+12
+12V AC Out
15 D3/B2 Data Bit 3/Bit Rate Select In
16
+5 +5V DC
Out
17 D2/B1 Data Bit 2/Bit Rate Select In
18
+24
+24V DC Out
19 D1/8/7 Data Bit 118 Bit Selectl7Bit Select In
20
+12
+ 12V DC
Out
21 PIS Parallel Select/Serial Select In
22
- - -
23
SELIN Select In In
24 GL Ground
-
25 PET TRS PETITRS Select In
26 GL Ground
-
NOTE: "Direction" refers to the direction of signal flow as viewed from the control circuit board.
2-5
REV. A