Panasonic KX-P8420 - Manual (Page 213)

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Appendix
The bidirectional parallel interface is based on the IEEE P1284-C standard.
If your computer has a bidirectional parallel port, the printer driver and
printer can take advantage of faster data transfer.
■ Specifications
■ Pin configuration
Connector Type IEEE 1284-C type connector
Cable Use a shielded cable 1.8 m (5.9 ft) or less in length.
Signal pin Return side pin Signal
1 19 Busy
2 20 Select
3 21 nAck
4 22 nFault
5 23 PError
6 24 Data 1
7 25 Data 2
8 26 Data 3
9 27 Data 4
10 28 Data 5
11 29 Data 6
12 30 Data 7
13 31 Data 8
14 32 nlnit
15 33 nStrobe
16 34 nSelectin
17 35 nAutoFd
18 — +5V(Host)
36 — +5V(Peripheral)
Bidirectional
Parallel Interface