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SUMMARY OF PRODUCT
Samsung Electronics
Service Manual
4.4.1 Asic(SPGPm)
1) ARM946ES
- 32-bit RISC embedded processor core
- 16KB instruction cache and 16KB data cache
- No Tightly Coupled Memory
- Memory Protection Unit & CP15 control program
2) Dual bus architecture for bus traffic distribution
- AMBA High performance Bus (AHB)
- System Bus with SDRAM
3) IEEE1284 compliant parallel port interface
4) Printer Video Controller for LBP engines
5) Graphic Execution Unit for Banding support of Printer Languages
6) 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)
7) 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
8) USB 2.0 Interface
9) Package
: 272 pins PBGA
10) Power
: 1.8V(Core), 3.3V(IO) power operation
11) Speed
: 166MHz core(ARM946ES) operation, 60MHz bus operation
4.4.2 Memory
1) Flash Memory
- It stores the System Program, downloads the System program through PC Interface, and compresses the
PCL font, then stores it.
- Capacity : 2M Byte
- Access Time : 70 nsec
2) DRAM
- It is used as Swath buffer, System working memory area, etc. when printing. It stores the font list, com-
pressed into flash memory, on DRAM and uses it as PCL font.
- Capacity : 8M Byte (Basic), upto 64M Byte (Factory Option)
- Type : SDRAM 100MHz/133MHz , 16bit