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