Epson 2070 User Manual - Page 134

Parallel interface forward channel, bit 3

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Parallel interface (forward channel) Transmission mode: 8-bit parallel, IEEE-P1284 compatibility mode Adaptable connector: 57-30360 (Amphenol) or equivalent Synchronization: STROBE pulse Handshaking: BUSY and ACKNLG signals Signal level: TTL. compatible (IEEE-P1284 level 11 device) The following table lists the parallel connector pin assignments and describes their respective interface signals. Pin S i g n a l no. n a m e GND In/Out* Description 1 STROBE 19 In Strobe pulse. Input data is latched at falling edge of the signal. 2 DATA 1 20 In Parallel input data to the printer. bit O:LSB 3 DATA 2 21 In bit 1 4 DATA 3 22 In bit 2 5 DATA 4 23 6 DATA 5 24 7 DATA 6 25 In bit 3 In bit 4 I n bit 5 8 DATA 7 26 In bit 6 9 DATA 8 27 I n bit 7:MSB 10 ACKNLG 28 Out This signal (negative pulse) indicates that the printer has received data and is ready to accept more. 11 BUSY 29 O u t This signal's high level means that the printer ready to accept data. 12 PE 28 O u t This signal's high level means that the printer is out of paper. 13 SLCT 28 O u t Always at high level when the printer in powered on. Specifications, Command Summa y, and Character Tables A-13

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Parallel interface (forward channel)
Transmission mode:
8-bit parallel, IEEE-P1284 compatibility
mode
Adaptable connector:
57-30360 (Amphenol) or equivalent
Synchronization:
STROBE pulse
Handshaking:
BUSY and ACKNLG signals
Signal level:
TTL. compatible (IEEE-P1284 level 11 device)
The following table lists the parallel connector pin assignments and
describes their respective interface signals.
Pin
Signal
no.
name
GND
In/Out*
Description
1
STROBE
19
In
Strobe pulse. Input data is latched at
falling edge of the signal.
2
DATA 1
20
In
Parallel input data to the printer.
bit O:LSB
3
DATA 2
21
In
bit 1
4
DATA 3
22
In
bit 2
5
DATA 4
23
In
bit 3
6
DATA 5
24
In
bit 4
7
DATA
6
25
In
bit 5
8
DATA 7
26
In
bit 6
9
DATA 8
27
In
bit 7:MSB
10
ACKNLG
28
Out
This signal (negative pulse) indicates
that the printer has received data and is
ready to accept more.
11
BUSY
29
Out
This signal's high level means that the
printer ready to accept data.
12
PE
28
Out
This signal's high level means that the
printer is out of paper.
13
SLCT
28
Out
Always at high level when the printer in
powered on.
Specifications, Command Summa y, and Character Tables
A-13