Main Controller; Flash Memory - Samsung SCX-6320F/XEC Service Manual

4.3.2 Main Controller

The Main Control Part comprises a main processor (SPGPm) and a graphics processor (CIP4E) which, by
adopting the dedicated processors for Fax & LBP machines, is implemented on a single PBA.
The Scanner Part comprises DADF & CCD and is connected with Main PBA through a cable harness.
4.3.2.1 SPGPm Printer controller
• ARM946ES processor
- 32-bit RISC embedded processor core
- 16KB instruction cache and 16KB data cache
- No Tightly Coupled Memory
- Memory Protection Unit &CP15 control program
• Dual bus architecture for bus traffic distribution
- AMBA High performance Bus (AHB)
- System Bus with SDRAM
• IEEE1284 compliant parallel port interface
• Printer Video Controller for LBP engines
• Graphic Execution Unit for Banding support of Printer Languages
• Printer Video Controller for LBP engines
- PVC : Printer Video Controller without RET Algorithm
- HPVC : Printer Video Controller with RET algorithm
(Line Memory & Lookup Table Memory : 512 x 8 , 4096 x 16)
• Engine Controller
- Motor Control Unit
- Motor Speed Lookup Table Memory (128 x 16 x 2)
- Pulse Width Modulation Unit
- 4 Channels are supported
- ADC Interface Unit
- 3 ADC Channels are available
- ADC Core (ADC8MUX8) maximum clock frequency :3 MHz
• USB 2.0 Interface
• Package : 272 pins PBGA
• Power : 1.8V(Core), 3.3V(IO) power operation
• Speed : 166MHz core(ARM946ES)operation,60MHz bus operation

4.3.2.2 Flash Memory

It stores the system program, this can be updated by downloading the system program through the PC Interface.
It is also used to store the FAX Journal, One Touch Dial and Speed Dial lists.
• Capacity :4M Byte
• Access Time :70 nsec
Samsung Electronics
Summary of Product
Service Manual
4-15