I

11.3 PIN FUNCTIONSON INTERFACES

ParallelInterface

2 DATA1 IN

3 DATA2 IN

$ DATA3 IN

5 DATA4 IN

6 DATA5 IN

7 DATA6 IN

B DATA7 IN

9 DATA8 IN

10 ACK OUT

11 BUSY OUT

12 PAPER OUT

OUT

13SELECTED OUT 14-15 N/C

16SIGNAL

,GND

17CHASSIS GND

18+5VDC OUT

19-30 GND

31 RESET IN

32 ERROR OUT

33-36 N/C

Function

Goesfrom High to Low (for at least 0.5 microseconds)when dataare valid.

Eight-bit character data. DATA8 is the most significant bit; DATA1 is the least significant bit, High is logic 1 and Low is logic O.

Alowpulseacknowledges receiptof data.

Low whentheprinteris ready to acceptdata.

GoesHighif theprinterruns out of paper.

Highwhentheprinteris on line

Unused

Signalground.

Printer’schassisground,

isolatedfromsignalground.

Externalsupplyof +5VDC

Twisted pair return signal ground level.

Low input resets the printer to

its power-oncondition.

Goeslow to siaal that the printer cannot@nt due to an errorcondition.

Unused

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Image 115
Star Micronics LaserPrinter4 manual PIN Functionson Interfaces