Xerox PHASER 3124 Service Manual page 107

USB wrapper for AHB interface
AHB bus interface
• Serial port interface (UART)
Programmable baud rate
2 channel Independent Full Duplex UART
Polling, Interrupt based operation support
Max 16 byte FIFO to handle SIR Bit Rate Speed
• Printer video controller for LBP engines (PVC)
20MHz video rate (Hummingbird 2 : letter - 21 ppm, A4 : 20ppm)
video data transmitted through LSU Controller
• Laser Scan Unit (LSU) controller
Laser Scan Unit (LSU) interface for Laser Diode turn on/off timing control
Sample & hold period generation.
Auto Power Control for laser diode with PID control method using internal 10 bits DAC.
LSU clock generation
Brushless DC motor control clock generation
• ADC interface
4 channels ADC interface for analog devices such as temperature sensor.
Programmable ADC clock cycle.
Automatic or Manual AD conversion support.
4 special function registers for monitoring the ADC results for 4 channels.
• PWM controller
4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION
• Bi-polar stepper motor controller (MOTORC)
Phase generation for the purpose of paper feeding
fixed hardware phase and current table
programmable phase and interval time
interrupt based phase change operation
• Timer
3 Independent programmable timers
Watch Dog timer for Software Trap
• Miscellaneous
Mux controlled 24 GPI, 28 GPO & 5 GPIO ports .
Mutual exclusive GPO/GPIO ports control by the port control enable register
Programmable bus master priority.
PHASER 3124 / PHASER 3125
General Procedures and Information
09/06 6-13