HP DesignJet ColorPro CAD Manual de usuario descargar pdf (Pagina 17)

Product Information1-11

Specifications

The Centronics Parallel Cable has only 8 data lines, 5 status lines, 4 ground lines and

ground connections between the host PC and the peripheral. Each of the signal lines has a

corresponding bit position in a memory address (register) in the host where data is read or

written. Sending data to the printer follows the sequence below:

Host places data in Data Out register

Host sends pulse on Strobe line

Printer sends pulse on Busy in response to pulse on Strobe

Printer reads data on Data Out lines

Printer sends pulse on ACK (Acknowledge) line after data is read

This method of data transfer is also known as the Compatibility mode and the transfer

rate of data is slow. The printer while operating in compatibility mode is capable of

indicating limited printer error feedback to the host computer. Such feedback includes:

Paper jam

Out of paper

Printer on or off line

Time out

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HP DesignJet ColorPro CAD Manual de usuario Pagina 17