HP DesignJet ColorPro CAD Manuel d'utilisateur télécharger pdf (Page 146)

Functional Overview6-26

Firmware

Firmware is the collective medium comprising of the computer, the printer mechanism

and the key panel that enables all three components to communicate and interact. The

printer by itself does not independent capability to process printing data (such as print

mode and byte stream), obtaining this data from the software-driven printer driver.

The printer is thus dependent on the host for the processing and sending of job data. The

Printer, however, supports full duplex (bi-directional) printing and is able to give

extensive feedback on print status to the host computer.

This is an overview of the firmware, summarizing the flow of data:

The firmware operates on three layers: the physical layer, the data link layer and the

application layer.

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HP DesignJet ColorPro CAD Manuel d'utilisateur Page 146