Oki OKIFAX 5750 Service Manual page 822

Service Guide OKIFAX 5750/5950 Page:
Chapter A Board Descriptions
A3.1.2 IOGA5
Purpose and Overview of This ASIC
This ASCI is used for the OKIFAX 5750/5950.
It controls the facsimile and printer, provides an interface with the PC, and implement MFP and the functions listed below.
The block diagram of this ASIC is shown on the next page.
Major functions of this LSI are as follows:
(1) Printer control
T600 dpi printing/ACC expansion/200-600 conversion or 300Æ600 conversion/smoothing
200Æ600)/high voltage control
(2) Interfacing with scanner control LSI
8-to-16 conversion
(3) IEEE1284 control
(4) DMA 4-channel
(5) Peripheral control
CS generation/ I/O port