GL842 Datasheet, PDF (54/64 Pages) GENESYS LOGIC – USB 2.0 2-in-1 Scanner Controller

GL842 USB 2.0 2-in-1 Scanner Controller
CHAPTER 5 BLOCK DIAGRAM
5.1 USB2.0 System Block Diagram
Host
GL842
(USB2.0 Interface+Scanner
ASIC Controller)
Two-In-One Controller
IO Device
Motor Driver
CCD/CIS
12 MHz DRAM AFE
Figure 5.1 - USB2.0 System Block Diagram
5.2 Function Block Diagram
Host
USB2.0
Controller
EPP
Circuit
Data
Interface
Data
Packing
Black &
White
CCD/CIS
Control
CCD/CIS
Motor
Driver
I/O
12 MHz
Motor
Control
GPIO
Control
PLL
Register Write
& Status Read
Clk-gen
Watchdog
Scanner
Flow
Control
Motor
Moving
Table
Gamma
Correction
A/D Data
Latch
White
Shading
Process
DPI
Control
Dark
Shading
Process
Average
Control
Front End
(16 Bits)
Shading, Image and Motor Table DRAM
(256K*16*1), (256K*16*2) or (1M*16)
Figure 5.2 - Function Block Diagram
Genesys Logic Inc.—All rights reserved.
Page 54