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APPENDIX
D-2. 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.
Table of connection signals for each mode
Pin No. Direction
Compatibility Mode
Signal Name
Nibble Mode
Signal Name
Byte Mode
Signal Name
1 In nStorobe 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 nAutoFd HostBusy HostBusy
15 N/C — —
16 GND GND GND
17 Flame GND Flame GND Flame GND
18 OUT Logic High Logic High Logic High
19 GND GND GND
20 GND GND GND
21 GND GND GND
22 GND GND GND
23 GND GND GND
24 GND GND GND
25 GND GND GND
26 GND GND GND
27 GND GND GND
28 GND GND GND
29 GND GND GND
30 GND GND GND