– 72 –
APPENDIX
Appendix D: Parallel interface
The two-way parallel interface is compatible with the IEEE1284 compatibility
mode, nibble mode and byte mode. Refer to the separate programmer’s manual
for details.
D-1. Table of Connection Signals for Each Mode
Pin No.
Direction
Compatibility Mode
Nibble Mode
Byte Mode
Signal Name
Signal Name
Sginal Name
1
In
nStrobe
HostClk
HostClk
2
In/Out
Data0
Data0
Data0
3
In/Out
Data1
Data1
Data1
4
In/Out
Data2
Data2
Data2
5
In/Out
Data3
Data3
Data3
6
In/Out
Data4
Data4
Data4
7
In/Out
Data5
Data5
Data5
8
In/Out
Data6
Data6
Data6
9
In/Out
Data7
Data7
Data7
10
Out
nAck
PtrClk
PtrClk
11
Out
Busy
PtrBusy/Data3,7
PtrBusy
12
Out
PError
AckDataReq/Data2,6
AckDataReq
13
Out
Select
Xflag/Data1,5
Xflag
14
In
Not used
HostBusy
HostBusy
15
N/C
—
—
16
Single GND
Single GND
Single GND
17
Flame GND
Flame GND
Flame GND
18
OUT
Logic High (+5V)
Logic High (+5V)
Logic High (+5V)
19 ~ 30
Twisted pair return GND
Twisted pair return GND
Twisted pair return GND
31
In
nInit
nInit
nInit
32
Out
nFault
nDataAvail/Data0,4
nDataAvail
33
External GND
—
—
34
Out
Compulsion Status
—
—
35
N/C
—
—
36
In
nSelectIn
1284Active
1284Active
