Compaq P5000 Series Dataproducts Parallel Interface Signals, Input Signals, Output Signals

Chapter 5 Dataproducts Parallel Interface

Dataproducts Parallel Interface

The Dataproducts parallel interface allows the printer to operate with a 50-pin Amplimite (AMP) HDH-20 data cable connector. The length of the data cable from the host computer to the printer must not exceed 40 feet (12 meters).

Table 11. Dataproducts Parallel Interface Connector Pin Assignments

(with a 50-pin AMP HDH-20 Data Cable Connector)

Input Signals		Output Signals		Miscellaneous
Signal	Pin	Signal	Pin	Signal	Pin
DATA LINE 1	19	READY	22	CABLE VERIFY	45, 46
Return	3	Return	6
DATA LINE 2	20	ONLINE	21	GROUND	39
Return	4	Return	5
DATA LINE 3	1	DEMAND/DATA REQ.	23	TEST	12
Return	2	Return	7
DATA LINE 4	41	PARITY ERROR	27
Return	40	Return	11
DATA LINE 5	34
Return	18
DATA LINE 6	43
Return	42
DATA LINE 7	36
Return	35
DATA LINE 8	28
Return	44
DATA STROBE	38
Return	37
PAPER INSTRUCTION	30
Return	14
BUFFER CLEAR	31
Return	15

NOTE: Pins not listed are not connected.

Dataproducts Parallel Interface Signals

Dataproducts-compatible interface signals between the host computer and the printer are defined as follows:

Data Lines 1 through 8. Provide eight standard or inverted levels from the host that specify character data, plot data, or a control code. Data Line 8 allows access to the extended ASCII character set. You can enable or disable this line via the Data Bit 8 parameter on the Dataproducts submenu (page 109).

Data Strobe. Carries a high true pulse from the host when data is ready. The data strobe remains high until the Data Request line goes false. The active

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