Control Circuit - Epson 610 Service Manual

EPSON Perfection 610

2.1.4 Control Circuit

The CPU (IC11) of this scanner is a one-tip 16-bit bus CPU operating at
20MHz. ASIC (IC7) manages input signal correction, image processing, and
controlling the CCD sensor board and USB interface. Table 2-3 shows the
major IC functions.
Table 2-3. Major ICs
IC Location
M37920 IC11
SDM4260CLU-6S IC3
BA033FP-E2 IC9
NJM78M05DLA-TE1 IC12
E02A32SA IC7
A3957SLBTR IC1, 2
M51953A IC8
AD9816JS IC24
M27C1001-10F1 IC5
SG-8002PHC CR1
CSTCS20.00 CR2
EE-SX1041 PC1
Operating Principles
Functions
CPU
24-bit Address Bus
16-bit Data Bus
DRAM 256k x 16bit
Regulator IC (3.3 VDC)
Regulator IC (5 VDC)
ASIC: Manages the following:
• Input image signal correction
• CCD control
• USB interface control
• Image processing
• Memory control
• Data in/output control
CR motor driver IC
Reset IC
12-bit A/D converter
Program ROM (128k x 8bit)
48MHz clock for E02A32SA
20MHz clock for CPU.
CR home position sensor
Engine Mechanism
Figure 2-6. Control Circuit Diagram
Rev. B
20