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GENERAL SPECIFICATIONS
4. Parallel Interface
4-1. General Specifications
Item Specifications
Synchronization System Via externally supplied STROBE pulses
I/F Protocol By ACK and BUSY signals
Logic Level Compatible with TTL level
Fig. 1-4 Timing Charts of Parallel Interface
4-2. Connector Signals
Pin No Signal Name Function Description
1 STROBE Goes from high to low (for ≥ 0.5µs) when active
2 DATA0 High when active
3 DATA1 High when active
4 DATA2 High when active
5 DATA3 High when active
6 DATA4 High when active
7 DATA5 High when active
8 DATA6 High when active
9 DATA7 High when active
10 ACK 9µs low pulse acknowledges receipt of data
11 BUSY Low when printer ready to receive data.
12 PAPER High when paper out. Can be disabled with Memory Switch setting.
13 SELECT High when printer is on-line
14,15 NC Unused
16 SIGNAL GND Signal ground
17 CHASSIS GND Chassis ground (isolated from signal ground)
18 +5V +5V DC output from printer
19 ~ 30 GND Twisted pair ground return
31 RESET When this input signal is low, printer is reset
32 ERROR Outputs low when printer cannot continue, due to an error
33 EXT GND External ground
34,35 NC Unused
36 SELECT IN Always high
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