Oki B4100 - Manual (Page 408)

40055101TH Rev.4 408 /
A3.2.6 M17 Circuit Diagram (Page 6/17)
1. Block diagram
The circuit diagram shown on page 6/17 consists of the IEXSEED (image processing LSI) of IC20
and SRAM.
Figure A3.2.6 shows the related signals of IEXSEED.
2. Functions
IEXSEED is newly developed LSI for the image processing of OKIFAX 5000 series.
IEXSEED contains the following functions:
•
Contact image sensor driver
• Send motor forward rotation/chopping control
• Line buffer control
3. SRAM
256 KByte SRAM x 1 (RAM1)
Stores the dark/light level correction data.
Error diffusion data and image separation data are processed by IEXSEED.
IC20
A0 - A3
AD0 - AD15
Data Bus
SDT2 - SDT7
MAD0 - MADE
MDT 0 - MDT7
RAM1
SRAM
256 KB MRD, MWR
A/D convertor
IC6
PHSA-PHSD
IEXSEED
MPT0-MPT3
DRV
CIS
PDCK (833KHz/1.25MHz)
ADCLK (833KHz/1.25MHz)
LEDON-P
MISP
CLK (20 MHz)
Contact
image
sensor
M S-motor
Address bus
Figure A3.2.6 Related Signals of IEXSEED