Citizen Systems CBM-253 manual Parallel interface, Input/output

CBM-253 User’s Manual

5.2Parallel interface

Specifications (Conform to Centronics)
Data transmission format	: 8-bit parallel
Synchronizing system	: According to the strobe pulses
Handshaking	: According to the BUSY signal
Signal level	: TTL level

Compatible interface connectors
Printer side	: Ribbon connector		57-40360 (DDK) equivalent product
Cable side	: Ribbon connector		57-30360 (DDK) equivalent product
Connector' s pin configuration
Connector pin		Signal name		Input/output	Function
l		*STB		Input	Strobe signal
2~9		DATA 1-8		Input	Input data
10		*ACK		Output	Request for next data
11		BUSY		Output	Processing is taking place
12		PE		Output	Paper end
13 (See note)		+5V		Output	+5V DC
14-15		N/C
16		GND			Ground
17		FG			Frame ground
18		N/C
19-30		GND			Twisted pair return signals
31		*RESET		Input	Reset
32		* FAULT		Output	Error
33		GND			Ground
34		COMPULSION		Output	COMPULSION signal
35 (See note)		+5V		Output	+5V DC
36		N/C

The * mark represents a negative logic.

N/C means not connected.

Note: Shied type cables should be used.

Note: Pins 13 and 35 can not be used by the user (Pulled up by 3.3K )

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