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Specifications
Cable Specifications
1284-B Connector Pin Assignments
The pin numbers and their assigned signal names for the 1284-B connectors are given
below.
Note
The abbreviations used in the "Source" column:
H = host; P = printer; Bi-Di = bi-directional
PIN# SOURCE COMPATIBLE NIBBLE BYTE ECP EPP
1 H nStrobe HostClk HostClk HostClk nWrite
2 Bi-Di* Data 1 (Least Significant Bit) AD1
3 Bi-Di* Data 2 AD2
4 Bi-Di* Data 3 AD3
5 Bi-Di* Data 4 AD4
6 Bi-Di* Data 5 AD5
7 Bi-Di* Data 6 AD6
8 Bi-Di* Data 7 AD7
9 Bi-Di* Data 8 (Most Significant Bit) AD8
10 P nAck PtrClk PtrClk PeriphClk Intr
11 P Busy PtrBusy PtrBusy PeriphAck nWait
12 P PError AckDataReq AckDataReq nAckReverse User Defined 1
13 P Select Xflag Xflag Xflag User Defined 3
14 H nAutoFd HostBusy HostBusy HostAck nDStrb
15 Not Defined
16 Logic Gnd
17 Chassis Gnd
18 P Peripheral Logic High
19 Signal Ground (nStrobe)
20 Signal Ground (Data 1)
21 Signal Ground (Data 2)
22 Signal Ground (Data 3)
23 Signal Ground (Data 4)
24 Signal Ground (Data 5)
25 Signal Ground (Data 6)
26 Signal Ground (Data 7)
27 Signal Ground (Data 8)
28 Signal Ground (PError, Select, nAck)
29 Signal Ground (Busy, nFault)