Cpu Board - Xerox MF Series Technical Document

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3.2 CPU
BOARD
The CPU board is based on the Digicolor2 circuit which performs in particular the function of micro-
processor.
The executable code is stored in the flash memory Z460.
This flash memory is divided in two zones: a zone reserved for the storage of the code and a zone
reserved for the storage of the documents.
The code is loaded from this flash memory into SDRAM, and the microprocessor executes its instruc-
tions from the SDRAM.
Before printing, the documents to be printed are stored as bitmaps in SDRAM.
The SDRAM is also used as the working memory for the Digicolor2.
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Signal Input/Output
VEILLE*
REVEIL*
STSC*
PSF*
OUVCAP*
P3V3
VALIM
ALIMCOUPE
HPM
HPP
O Not used
I Not used
O Start of scan sensor
O Sheet present sensor
O Cover open sensor
- 3.3 V supply
- 5 V supply
- 5 V supply
I Differential LF signal to
loudspeaker
I Differential LF signal to
loudspeaker
TD 252 787 467 - A
Use