System Overview
3.2.4 Printer Section
Printer is consisted of the Engine parts and F/W, and said engine parts is consisted of the mechanical parts comprising Frame, Feeding, Developing, Driving, Transferring, Fusing, Cabinet and H/W comprising the main control board, power board, operation panel, PC Interface.
The main controller is consisted of Asic(Chorus2) parts, Memory parts, Engine.
Interface parts and it functions as Bus Control, I/O Handling, drivers & PC Interface by CPU.
Memory Access supports 16bit Operation, and Program Memory 1MB and Working Memory as well.
The Engine Board and the Controller Board are in one united board, and it is consisted of CPU part and print part in functional aspect. The CPU is functioned as the bus control, I/O handling, drivers, and PC interface. The main board sends the Current Image, Video data to the LSU and manages the conduct of Electrophotography for printing. It is consisted of the circuits of the motor (paper feed, pass) driving, clutch driving,
The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.
3.2.4.1 ASIC
Chorus 2
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-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 :
Power : 1.8V(Core), 3.3V(IO) power operation
Speed : 66MHz core(ARM7TDMI) operation, 60MHz bus operation
Samsung Electronics
