Oki B4100 - Manual (Page 385)

40055101TH Rev.4 385 /
A3.1.2 R44 Circuit Diagram (Page 2/12)
1. Block diagram
The circuit diagram shown on page 2/12 consists of an input/output gate array IC2 (IOGA3).
Figure A3.1.2 shows the related signals of IOGA3.
2. Functions
IOGA3 is newly developed LSI for scanning and printing control of OKIOFFICE 44/OKIFAX
4100.
IOGA3 contains the following functions:
•
Scanning sensor control
• Send motor control
• Various image data processing control for scanning data
• Strobe signals control for LED head
• Smoothing control for printing data
• Interface of the peripheral LSI, optional memory and CPU
Scanning
control
Data/address bus
Data/address bus
A4 image
sensor
M S-motor
1/4
Printer control
OST-EX
Buffer 640 bytes
Decoding
(RLE, TIFF, ACC32)
200-300 converter
smoothing
Various sensor
2/4
LED head
Data/address bus
High-voltage
controller
3/4
High-voltage
power supply
TLHV/OLHV
Data/address bus Peripheral control
1284 control
CS generation
I/O port
4/4
Bi-Centro
I/F
CTR
OPE unit
Speaker
Figure A3.1.2 Related Signals of IOGA