HP 2500c Service Manual - Page 16

Cable Specifications

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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# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 SOURCE H Bi-Di* Bi-Di* Bi-Di* Bi-Di* Bi-Di* Bi-Di* Bi-Di* Bi-Di* P P P P H P COMPATIBLE nStrobe nAck Busy PError Select nAutoFd NIBBLE BYTE ECP HostClk HostClk HostClk Data 1 (Least Significant Bit) Data 2 Data 3 Data 4 Data 5 Data 6 Data 7 Data 8 (Most Significant Bit) PtrClk PtrClk PeriphClk PtrBusy PtrBusy PeriphAck AckDataReq AckDataReq nAckReverse Xflag Xflag Xflag HostBusy HostBusy HostAck Not Defined Logic Gnd Chassis Gnd Peripheral Logic High Signal Ground (nStrobe) Signal Ground (Data 1) Signal Ground (Data 2) Signal Ground (Data 3) Signal Ground (Data 4) Signal Ground (Data 5) Signal Ground (Data 6) Signal Ground (Data 7) Signal Ground (Data 8) Signal Ground (PError, Select, nAck) Signal Ground (Busy, nFault) EPP nWrite AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 Intr nWait User Defined 1 User Defined 3 nDStrb 1-8 Product Information

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Product Information
1-8
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
P
IN
#
S
OURCE
C
OMPATIBLE
N
IBBLE
B
YTE
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)