Star Micronics SP200F user manual Appendix B Parallel Interface, B-1. Interface Specifications

Models: SP200F

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Appendix B: Parallel Interface

Appendix B: Parallel Interface

B-1. Interface Specifications

The operating specifications of the parallel interface are as follows.

(1)

Data transfer rate

:

1000 to 6000 characters per second

(2)

Synchronization

:

Via externally supplied

 

pulses

STROBE

(3)

Handshaking

:

ACK

and BUSY signals

(4)

Logic level

:

Compatible with TTL level

B-2. Interface Timing

ACK

Approx.9 s

Data

STROBE

BUSY

T

T

T

 

 

 

T:more than 0.5 s

APPENDIX

Fig. B-1 Interface timing diagram

 

Signal Name

Circuit Example

 

4.7KΩ

74HC Compatible

 

DATA 1-DATA 8

 

 

(To Printer)

 

INPUT

1KΩ

74HC Compatible

 

 

STROBE

100Ω

 

(To Printer)

470pF

OUTPUT

 

1.8KΩ

74LS Compatible

 

BUSY, ACK

 

 

(From Printer)

 

Fig. B-2 Typical interface circuit

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Page 95
Image 95
Star Micronics SP200F user manual Appendix B Parallel Interface, B-1. Interface Specifications, B-2. Interface Timing