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Description of the physical interface Appendix
378
T5023/5023+ - Programming Guide
Signal description printer side (Centronics plug) in the compatibility
mode and ECP-mode
Pin-No. Source ECP-Mode Compatible Mode
1 Host HostClk nStrobe
2 Bidirectional Data 1 (LSB) Data 1 (LSB)
3 Bidirectional Data 2 Data 2
4 Bidirectional Data 3 Data 3
5 Bidirectional Data 4 Data 4
6 Bidirectional Data 5 Data 5
7 Bidirectional Data 6 Data 6
8 Bidirectional Data 7 Data 7
9 Bidirectional Data 8 (MSB Data 8 (MSB
10 Printer PeriphClk nAck
11 Printer PeriphAck Busy
12 Printer nAckReverse PError
13 Printer Xflag Select
14 Host HostAck nAutoFd
15 Not defined Not defined
16 Logic Grd Logic Grd
17 Chassis Grd Chassis Grd
18 Printer Peripheral Logic High Peripheral Logic High
19 Signal Ground
(nStobe)
Signal Ground
(nStobe)
20 Signal Ground
(Data 1)
Signal Ground
(Data 1)
21 Signal Ground
(Data 2)
Signal Ground
(Data 2)
22 Signal Ground
(Data 3)
Signal Ground
(Data 3)
23 Signal Ground
(Data 4)
Signal Ground
(Data 4)