HP dc7800 Parallel Interface Connector, DB-25 Parallel Connector Pinout, Pin Signal Function

Input/Output Interfaces

5.6.4 Parallel Interface Connector

Figure 5-5 and Table 5-5 show the connector and pinout of the parallel interface connector. Note that some signals are redefined depending on the port's operational mode.

Figure 5-5. DB-25 Parallel Interface Connector (as viewed from rear of chassis)

Table 5-5.

DB-25 Parallel Connector Pinout

Pin	Signal	Function	Pin	Signal	Function
1	STB-	Strobe / Write [1]	14	LF-	Line Feed [2]
2	D0	Data 0	15	ERR-	Error [3]
3	D1	Data 1	16	INIT-	Initialize Paper [4]
4	D2	Data 2	17	SLCTIN-	Select In / Address. Strobe [1]
5	D3	Data 3	18	GND	Ground
6	D4	Data 4	19	GND	Ground
7	D5	Data 5	20	GND	Ground
8	D6	Data 6	21	GND	Ground
9	D7	Data 7	22	GND	Ground
10	ACK-	Acknowledge / Interrupt [1]	23	GND	Ground
11	BSY	Busy / Wait [1]	24	GND	Ground
12	PE	Paper End / User defined [1]	25	GND	Ground
13	SLCT	Select / User defined [1]	--	--	--

NOTES:

[1]Standard and ECP mode function / EPP mode function

[2]EPP mode function: Data Strobe

ECP modes: Auto Feed or Host Acknowledge

[3]EPP mode: user defined

ECP modes:Fault or Peripheral Req.

[4]EPP mode: Reset

ECP modes: Initialize or Reverse Req.

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