Interface 111

Parallel, TTP 2020

Parallel, TTP 2020

The TTP 2020 parallel port is bi-directional and support Compatibility and

Reverse-Nibble modes.

Note • If you intend to use any other mode than Compatibility Mode, we recommend you to get the documents for the IEEE-1284 standards, and study them thoroughly.

Table 5 • Signal Names for the Parallel Port

Pin Host

 

 

 

 

 

Nibble and

 

 

Pin Printer

Compatible Signal

Byte Mode

IEEE1284-A

Direction

IEEE1248-C

Names

Signal

(D-Sub)

 

 

 

 

 

 

 

Names

 

 

 

 

 

 

1

Ö

 

15

nStrobe

HostClk

2-9

Ö

 

6-13

Data

Data

10

Õ

 

3

nAck

PtrClk

11

Õ

 

1

Busy

PtrBusy

12

Õ

 

5

PError

AckDataReq

13

Õ

 

2

Select

Xflag

14

Ö

 

17

nAutoFd

HostBusy

15

Õ

 

4

nFault

nDataAvail

16

Ö

 

14

nInit

nInit

17

Ö

 

16

nSelectIn

IEEE 1284 Active

18-25

 

GND

 

19-35

Ground

Ground

 

 

ڙ

 

18

Host Logic

High

 

 

└Õ

 

36

Peripheral Logic High

Note • Signal names starting with

"n" are active LOW signals.

 

Error Signaling

All errors that are not reset when status is read will set the nFault signal, for example:

•Head lifted

•Cutter not home

•Out of paper

This error also sets the Paper Out/End (PE) together with nFault:

• Out of paper

Note • The signaling of nFault and PE can be switched on/off with parameter p5.

09/14/2009

TTP 2000 Technical Manual

P1002902-002