Tektronix Phaser 340 User Manual
Page 182
Technical Notes
A
User Manual
A-11
3
nAck/PtrClk
21
Printer
C mode: Negative true = data
transfer acknowledge
N mode: Data qualifier
4
nFault/nDataAvail
22
Printer
C mode: Negative true = printer
fault exists that prevents
printing
N mode: Negative low = data ready,
then data bits 0 then 4
5
PError/AckDataReq
23
Printer
C mode: Positive true = printer error
exists, such as media tray
empty
N mode: Data bits 2 then 6
6
Data 1
24
Host
C mode: Positive true data input
N mode: Not used
7
Data 2
25
Host
C mode: Positive true data input
N mode: Not used
8
Data 3
26
Host
C mode: Positive true data input
N mode: Not used
9
Data 4
27
Host
C mode: Positive true data input
N mode: Not used
10
Data 5
28
Host
C mode: Positive true data input
N mode: Not used
11
Data 6
29
Host
C mode: Positive true data input
N mode: Not used
12
Data 7
30
Host
C mode: Positive true data input
N mode: Not used
13
Data 8
31
Host
C mode: Positive true data input
N mode: Not used
Parallel port signal descriptions (cont'd.)
Pin
Signal mode names:
Compatibility/Nibble
Return
pin
Signal
source
Description