Tektronix Phaser 340 User Manual page 182

Parallel port signal descriptions (cont'd.)
Pin Signal mode names:
Compatibility/Nibble
3 nAck/PtrClk
4 nFault/nDataAvail
5 PError/AckDataReq
6 Data 1
7 Data 2
8 Data 3
9 Data 4
10 Data 5
11 Data 6
12 Data 7
13 Data 8
Return Signal Description
pin source
21 Printer C mode: Negative true = data
N mode: Data qualifier
22 Printer C mode: Negative true = printer
N mode: Negative low = data ready,
23 Printer C mode: Positive true = printer error
N mode: Data bits 2 then 6
24 Host C mode: Positive true data input
N mode: Not used
25 Host C mode: Positive true data input
N mode: Not used
26 Host C mode: Positive true data input
N mode: Not used
27 Host C mode: Positive true data input
N mode: Not used
28 Host C mode: Positive true data input
N mode: Not used
29 Host C mode: Positive true data input
N mode: Not used
30 Host C mode: Positive true data input
N mode: Not used
31 Host C mode: Positive true data input
N mode: Not used
A
Technical Notes
transfer acknowledge
fault exists that prevents
printing
then data bits 0 then 4
exists, such as media tray
empty
A-11
User Manual