Epson Perfection 610 - Manual (Page 20)

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
A M P .
C P U ( I C 1 1 )
U S B
A d d r e s s B u s
D a t a B u s
E 0 2 A 3 2 ( I C 7 )
C L K
( C R 1 )
C R
M o t o r
R e s e t I C
( I C 8 )
H . P . S e n s o r
( P C 1 )
C R M o t o r
D r i v e r
( I C 1 , 2 )
P R O M
( I C 5 )
I m a g e D a t a
( R / G / B )
D R A M
( I C 3 )
L a m p
&
I n v e r t e r B o a r d
C C D B o a r d
C L K
( C R 2 )
R e g u l a t o r ( I C 9 )
3 . 3 V D C
R e g u l a t o r ( I C 1 2 )
5 V D C