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EPSON Perfection 610 Rev. B
Operating Principles Engine Mechanism 20
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
Figure 2-6. Control Circuit Diagram
IC Location Functions
M37920 IC11
CPU
24-bit Address Bus
16-bit Data Bus
SDM4260CLU-6S IC3 DRAM 256k x 16bit
BA033FP-E2 IC9 Regulator IC (3.3 VDC)
NJM78M05DLA-TE1 IC12 Regulator IC (5 VDC)
E02A32SA IC7
ASIC: Manages the following:
• Input image signal correction
• CCD control
• USB interface control
• Image processing
• Memory control
• Data in/output control
A3957SLBTR IC1, 2 CR motor driver IC
M51953A IC8 Reset IC
AD9816JS IC24 12-bit A/D converter
M27C1001-10F1 IC5 Program ROM (128k x 8bit)
SG-8002PHC CR1 48MHz clock for E02A32SA
CSTCS20.00 CR2 20MHz clock for CPU.
EE-SX1041 PC1 CR home position sensor
AMP.
CPU (IC11)
USB
Address Bus
D a ta B u s
E02A32 (IC7)
CLK
(CR1)
CR
Motor
Reset IC
(IC 8 )
H.P. Sensor
(P C 1 )
CR Motor
Driver
(IC 1 , 2)
PROM
(IC 5 )
Im age Data
(R /G /B )
DRAM
(IC 3 )
Lam p
&
Inverter B oard
CCD Board
CLK
(
CR2
)
R e g u la to r (IC 9 )
3.3VDC
R e g u la to r (IC 1 2 )
5VDC