Epson FilmScan 200 Service Manual page 45

FilmScan 200
Table 2-4 lists the functions of the scanner's main elements.
Component
CPU HD6413003
ASIC E02A14
M64154
1M-bit ROM
1M-bit PS-RAM
M54670P
2-12
Table 2-4. Main Components Functions
Location Function
IC8 The CPU, which operates at 14.74 MHz, controls scanner operation.
IC4 This ASIC has following functions:
Fluorescent lamp control
CCD sensor control
10-bit A/D converter control
Shading correction
Gamma correction
Color correction
Zooming
Half-toning
Also, this ASIC employs two 1 M-bit RAMs (Ic5 and IC6) as
external memories.
IC16 This IC has following functions:
Bi-directional parallel interface control
SCSI control
LEDs display control
IC11 Program ROM
IC10 CPU working area RAM
IC13, Motor drivers for main scan motor and Preview motor
IC26
IC2 10-bit A/D converter
Rev. A