Epson LQ-570e, Руководство по обслуживанию

Страница: 108 / 129

EPSON
LQ-570e/LQ-580
Revision
C
Appendix Connector
summary
108
The
following tables are connector pin assignment.
Table
7-2. Connector Pin Assignment-CN1
Pin
No. I/O
Signal
Name
Function
1 I /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
H
This
line is pulled up to +5V through 3.9 k Ω
.
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 k
Ω
.
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