Epson FX-880 Service Manual page 87

Pin No. I/O
1 - 6
7 O
8 O
9 I
10
11 O
12 O
13 I
14 I
15 I
16 O
17 O
18 O
19 - 24
25 O
26 O
27 O
28 O
29 I/O
30 I/O
31 I/O
32 I/O
33 I/O
34 I/O
35 I/O
36 I/O
Pin No. I/O
1 O
2 I
3 - 4
5 - 6
7
8
9 - 10
Pin No. I/O
1 I
2
Rev. A
Table 7-3. Connector Pin Assignment - CN2
Signal Name
+5 +5 V
TXD Transmit data
/READY Ready to receive data
RXD Receive data
NC Not connected.
/RST Reset
INH Inhibit
/CMREQ Command request
/WRRDY Write ready
/RDRDY Read request
/WR Write
/RD Read
/CS chip select
GND Ground
A3 Address bus bit 3
A2 Address bus bit 2
A1 Address bus bit 1
A0 Address bus bit 0
D7 Data bus bit 7
D6 Data bus bit 6
D5 Data bus bit 5
D4 Data bus bit 4
D3 Data bus bit 3
D2 Data bus bit 2
D1 Data bus bit 1
D0 Data bus bit 0
Table 7-4. Connector Pin Assignment - CN3
Signal Name
PSC
PWDN
+5V +5V
GND Ground
+35V +35V
+35V +35V
GP Ground
Table 7-5. Connector Pin Assignment - CN4
Signal Name
HP HP Detector signal
GND Ground
FX-880 Service Manual
Function
Function
Function
Appendix
7-3