Ieee 1284-B Nibble Mode Signals - Genicom LA36 User Manual

Pin Direction
33
34
35
36

IEEE 1284-B Nibble Mode signals

The following table briefly gives connector pin assignments in IEEE 1284 mode.
Pin Direction
1 To printer
2 To printer
3 To printer
4 To printer
5 To printer
6 To printer
7 To printer
8 To printer
9 To printer
10 From printer
11 From printer
12 From printer
13 From printer
14 To printer
15
16
17
18 From printer
19-29
30
Signal Description
0 volts. Same as pins 14, 19-30.
Not used
Not used
Not used
Signal Description
HostClk High in reverse data transfer phase
DATA BIT 1 These signals are the 1st to the 8th bits of
DATA BIT 2 parallel data.
DATA BIT 3
DATA BIT 4 These signals are active high for a logical 1.
DATA BIT 5
DATA BIT 6
DATA BIT 7
DATA BIT 8
PtrClk Set to low to qualify data on reverse channel
PtrBusy Reverse channel: Data 3 and 7
AckDataReq Reverse channel: Data 2 and 6
Xflag Reverse channel: Data 1 and 5
Host Busy Set to low to indicate that the host can
receive data
Set to high Host Acknowledge Receipt
Not used
0 volts. Logic ground
Chassis ground
Peripheral Logic Set to high to indicate the printer is ON
High and all signals are in valid state.
- Max output current 50 mA
0 volts. Signal ground
0 volts. Signal ground
Interface Information
D-3