CHAPTER 2

E.Video Interface Control

1. Outline

To connect the printer to an external device, such as a host computer, a video controller PCB (interface PCB) is needed.

This section explains the kinds of interface signals exchanged between the printer and the video controller PCB, and gives information concerning the sequence of printer operation mak- ing use of interface signals.

a. Video interface signals

External device

(host computer, etc.)

Video controller

Printer

DC controller

PCB

PCB

/BD

 

/PPRDY

 

/RDY

Laser

/VSREQ

driver

LASER DRIVE

 

/SBSY

signal

/STS

(VDO, /VDO)

 

/CCRT

 

/PCLK

 

/PDLV

 

/PFED

 

/SPCHG

 

/CBSY

 

/PRNT

 

/VSYNC

 

/PRFD

 

/CPRDY

 

VDO

 

/VDO

 

/CMD

 

/CCLK

 

CPSEL

 

/FPCS

 

/FPO

 

/FPI

 

FPCK

 

Figure 2-2-12

 

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Image 61
Canon 3260 manual Video Interface Control Outline, Video interface signals