LK-T21 Technical Manual
2.1.6 Centronics parallel interface
1) Specifications
Data transmission: 8-bit parallel
Synchronization: STROBE pulse supplied by host computer.
Handshaking: ACK and BUSY
Connector: D-SUB 36(female) or equivalent
DATA Data n Data n+1
tHold
nStrobe
tSetup tSTB
Busy Peripheral Busy
tReady tBUSY
nAck
tReply tACK tnBUSY
tNext
PIN SIGNAL I/O DESCRIPTION
1 STROBE- Input Synchronize signal Data received
2-9 DATA0-7 Input Data bit Transmitted 0-7
10 ACK- Output Data receiving competed
11 BUSY Output Impossible to printer data receiving
12 PE Output Paper empty
13 SELECT Output Printer’s status for ON/OFF line
14 AUTO FEED- Input ND
15 GROUND - System Ground
16 GROUND - System Ground
17 NC -
18 LOGIC-H - +5V
19-30 GROUND - System Ground
31 INIT- Input Initialize
32 ERROR- Output Printer Error
33 GROUND - System Ground
34 NC -
35 +5V - +5V
36 SELECT IN- Input ND
14
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