Epson LQ-570e - Page 108

EPSON LQ-570e/LQ-580 Revision C
Appendix
C
onnector summary
1
08
The following tables are connector pin assignment.
Table 7-2. Connector Pin Assignment-CN1
Pin No. I/O Signal Name Function
1I/STROBE
Strobe pulse. Input data is latched at falling edge of the
signal.
2 - 9 I DATA1 - DATA8 Parallel input data to the printer
10 O /ACKNLG
This pulse indicates that the printer has received data
and turned into ready to accept next one.
11 O BUSY
When this signal is HIGH, the printer is not ready to
accept data.
12 O PE
When this signal is HIGH, the printer is in a state of
paper-out error
13 O SLCT
This signal is always HIGH when the printer is power
on.
14 I /AFXT Not used.
15 - NC Not connected.
16 - GND Signal ground
17 - Chassis Chassis ground
18 O Logic HThis line is pulled up to +5V through 3.9 kΩ.
19 - 30 - GND Signal ground
31 I /INIT This signal initializes the printer.
32 O /ERROR This signal is output when the printer is in error.
33 - GND Signal ground
34 - NC Not connected.
35 O +5V This line is pulled up to +5V through 1.0 kΩ.
36 O /SLIN
This signal is always HIGH when the printer is power
on.
Table 7-3. Connector Pin Assignment-CN2
Pin No. I/O Signal Name Function
1-6 - +5 +5V
7 O TXD Transmit data
8 O /READY Ready to receive data
9 I RXD Receive data
10 - NC Not connected.
11 O /RST Reset
12 O INH Inhibit
13 I /CMREQ Command request
14 I /WRRDY Write ready
15 I /RDRDY Read request
16 O /WR Write
17 O /RD Read
18 O /CS chip select
19 - 24 - GND Ground
25 O A3 Address bus bit 3
26 O A2 Address bus bit 2
27 O A1 Address bus bit 1
28 O A0 Address bus bit 0
29 I/O D7 Data bus bit 7
30 I/O D6 Data bus bit 6
31 I/O D5 Data bus bit 5
32 I/O D4 Data bus bit 4
33 I/O D3 Data bus bit 3
34 I/O D2 Data bus bit 2