30 Dec
2001
30 Dec
'01
10:04 a.m.
Everything
I've ever seen concerning the printer's interface
refers to it as a high-speed serial interface, though I've rarely
Which the Canon 'video' interface technically is. You send a serial bit
stream to the laser driver. With no framing or any other kind of protocol. There's a serial clock/data pair for status (paper
out, jam, errors,
paper size, etc) and commands (select paper tray, select manual feeder,
and so on). And some ready signals so both sides know that the other side
is turned on.
The actual pinout for the connection is:
1 LP CLK
2 LP Data In
3 LP Data Out 1
4 LP Data Out 2
5 LP PWR Enable
6 GND
7 GND
8 GND
9 NC
This sounds suspiciously like the Canon 'video'
interface. Just out of
curiousity, what connector is used (the Canon standard one is a DC37-S on
the printer).
The connection on the CPU end is a DE-9M. My NeXT laser
printer is sitting in my office awaiting replacement of it's feed
roller and ejection gear, so I can't doublecheck the connector on the
printer end. I believe it's the same as the CPU though, as I don't
recall the cable being different on each end.
Jeff
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