Xerox WORKCENTRE 3119 Service Manual page 126

General Procedures and Information
CPU
The use of a 16/32Bit RISC Processor, Chorus 2,which is an exclusive controller to control the
Printer and to execute operation blocks using flash memory within the system program. It also
controls the whole system.
• Main function block
- Completely Integrated System for Embedded Applications,
- 16/32 Bit Risc Architecture, Efficient and Powerful ARM7 Core.
- LSU Interface Module for Interfacing PVC with LSU
- 5 Channel General Purpose DMA Controllers for High Speed I/O
- Operation Frequency: System: 66MHz, Bus: 66MHz
- Operation Voltage : 3.3V
-4KB instruction cache and 4KB data cache
- No Tightly Coupled Memory
- Memory Protection Unit & CP15 control program
• 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
• Engine Controller
- Motor Control Unit
- Motor Speed Lookup Table Memory (128 x 16 x 2)
- Pulse Width Modulation Unit
- 2 Channels are supported
- ADC Interface Unit
- 2 ADC Channels are available
- ADC Core maximum clock frequency: 2.5 MHz
• USB 2.0 Interface
• Package : 208-LQFP-2828
• Power : 1.8V(Core), 3.3V(IO) power operation
Speed : 66MHz core(ARM7TDMI) operation, 60MHz bus operation
2) Flash Memory
Record System Program, and download System Program by PC INTERFACE.
• - Size: 1M Byte
• - Access time: 70 nsec
3) SDRAM
Used as Page Buffer in Printing, Scan Buffer in Scanning and System Working Memory Area
• - Size: 8Mbyte
• - 3.5 MB: System Working Memory Area and Scan Buffer
• - 4.5 MB: Printing System Working Memory Area
• - Max Frequency: 133MHz
6-16 06/06 WorkCentre 3119