HP Support Online Guide DJINTRFC
Print er I nt erf ace |
HP DeskJet Print ers |
HP DeskJet Printers
The following information applies to HP DeskJet 500, 600 and 800 Series printers.
Interface information for HP DeskWriter printers and Macintosh compatible dual-port DeskJet printers such as HP DeskJet 850C, 855C and 870C may be found under “Printer Interface/HP DeskWriter Printers.”
Cable and Connector Information
Recommended Interface Cables
|
HP Cable |
|
|
Host Interface |
Part Number |
Cable Length |
Cable Connectors |
HP IEEE-1284 |
C2950A |
2 Meters |
DB-25 Male to 36-Pin |
Compliant Cable |
|
|
Centronics Male |
HP IEEE-1284 |
C2951A |
3 Meters |
DB-25 Male to 36-Pin |
Compliant Cable |
|
|
Centronics Male |
|
|
|
|
Interface Specifications
HP DeskJet printers communicate with computers through a single IEEE1284-B parallel I/O interface connector. For more information about interface connection and operation, see “DOS I/O Interface Description.”
Communication Modes and Supported Protocols
Category |
Specification |
|
Interface Protocol |
IEEE-1284 Compatible |
|
Communication Modes Available |
* |
Compatible (Centronics) |
|
* |
Nibble |
|
* ECP |
|
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Print er I nt erf ace |
HP DeskJet Print ers |
IEEE-1284 Interface Connector
IEEE-1284 Interface Port (DOS/MS Windows)
Pin |
|
Compatibility |
Nibble |
ECP |
Number |
Source |
Mode |
Mode |
Mode |
|
|
|
|
|
1 |
Host |
nStrobe |
HostClk |
HostClk |
2 |
Bi-Directional |
|
Data 1 (LSB) |
|
3 |
Bi-Directional |
|
Data 2 |
|
4 |
Bi-Directional |
|
Data 3 |
|
5 |
Bi-Directional |
|
Data 4 |
|
6 |
Bi-Directional |
|
Data 5 |
|
7 |
Bi-Directional |
|
Data 6 |
|
8 |
Bi-Directional |
|
Data 7 |
|
9 |
Bi-Directional |
|
Data 8 |
|
10 |
Bi-Directional |
nAck |
PrtClk |
PeriphClk |
11 |
Bi-Directional |
Busy |
PrtBusy |
PeriphAck |
12 |
Bi-Directional |
PError |
AckDataReq |
nAckReverse |
13 |
Bi-Directional |
Select |
Xflag |
Xflag |
14 |
Host |
nAutoFd |
HostBusy |
HostAck |
15 |
|
|
|
|
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Continued on next page
Print er I nt erf ace |
HP DeskJet Print ers |
IEEE-1284 Interface Port (DOS/MS Windows) (Cont.)
Pin |
|
Compatibility |
Nibble |
ECP |
Number |
Source |
Mode |
Mode |
Mode |
16 |
|
|
Logic Gnd |
|
17 |
|
|
Chassis Gnd |
|
|
|
|
|
|
18 |
Peripheral |
|
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) |
|
|
|
|
|
|
30 |
|
|
Signal Ground |
|
|
|
|
(nAuto Fd, nSelectLn, nInit) |
|
31 |
Host |
nInit |
nInit |
nReverseRequest |
|
|
|
|
|
32 |
Peripheral |
nFault |
nDataAvail |
nPeriphRequest |
36 |
Host |
nSelectLn |
1284 Active |
1284 Active |
|
|
|
|
|
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