Pin No.

Direction

Compatibility Mode

Nibble Mode

Byte Mode

Signal Name

Signal Name

Sginal Name

 

 

 

 

 

 

 

31

In

nInit

nInit

nInit

 

 

 

 

 

32

Out

nFault

nDataAvail/Data0,4

nDataAvail

 

 

 

 

 

33

 

EXT GND

 

 

 

 

 

34

Out

Compulsion Status

35

Out

+5V

 

 

 

 

 

36

In

nSelectIn

1284Active

1284Active

 

 

 

 

 

Note: 1. The prefix “n” on the signal name refers to low active signals.

If the host does not have any one of the signal lines listed above, two-way communication fails.

2.For interfacing, signal lines should always use twisted pair cables with the return sides connected to the signal ground level.

3.Cautions when resetting the printer using the nInit signal (#31 pin). Reset can be made from #31 pin (nInit signal) of the interface when the DIP switch 1-1 is set to on. (Factory setting is on.)

In addition, when reset has been enabled by #31 pin (nInit signal), it can be set to reset when the following conditions have been established: DIP switch 1-2 has been set to off, #36 pin (nSelectIn/ 1284 active signal) is low, and #31 pin (nInit signal) is low.

4.During factory output, IFEE 1284 printer device ID reply will be “Invalid.” To get the device ID, change memory switch 6-C to “Valid.” For instructions on setting the memory switch, please refer to the separate Programmer’s Manual.

APPENDIX

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Star Micronics SP2000 user manual 158