Samsung CLX-8540ND Service Manual page 40

2.3.2.4 OPE_Main Board
The OP_main board controls the WVGA(800x600) 7" Color TFT LCD unit, and communicates with Video
controller through USB1.1. The OP_main board is connected with Key & Key_Sub boards which are used for
scan and fax functions.
The OP_main board includes an ARM-based CPU (S3C2413C), a 32MB NOR Flash ROM, a 64MB DDR1
SDRAM memory, and a TSP control unit.
Main IF (power)
NOR FLASH NOR FLASH
(32MB) (32MB)
OPE Key sub OPE Key sub
Back Light Unit
Service Manual
Product Overview
Main IF (USB) DDR MEMORY
(64MB)
LCD Interface LCD Interface
Touch Screen
2-29
MCU (S3C2413)
Debugger JTAG
OPE Key
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