Main Controller - Samsung SCX-4500 Service Manual

Product specification and feature

2.2.3.2 Main Controller

SCX-4500 is consisted of ASIC(CPU), scan part and print part and Bus Control. I/O Handling, scan part, each driver,
and PC interface are working controlled by the CPU.
Main Controller has full capability on Main Board. There are 2 major functions in the CPU which are Controller ASIC and
Image Processor.
1) CPU : 16Bit RISC Processor, Chrous II for printers and MFPs is used and controls the system operating each
operation block by system program in Flash Memory.
2) Flash Memory : saves system program and each parameter used in system, and downloads the system program by
PC Interface.
- Memory : 1 Mbyte
- Access Time : 100 nsec
3) SDRAM : used by Print Buffer while printing, Scan Buffer while scanning, and System Working Memory.
- Memory : 8 Mbyte
- Operating Frequency : 66 MHz
SDRAM - 8MB * 1 EA
Flash ROM - 1MB
USB 2.0
Service Manual
2-18
Scan Motor driver
(AN44060)
Video Clock and SSCG
Main Clock and SSCG
CPU - Chorus2
Samsung Electronics