Xerox WorkCentre 3220 - Page 77

WorkCentre 3210/3220 Multifunction Printer Service Manual 2-21
Theory of Operation
UART ■ 4 channels
Interrupt
■ Supports up to 4 dedicated external interrupts
■ Supports 64 internal interrupts
Timer
■ 6 system timers for general purpose
■ 1 watchdog timer
■ Supports RTC
MAC
■ 10 Mbps/ 100 Mbps
■ Full IEEE 802.3, 802.3u compatibility
PPI
■ IEEE 1284 Compliant Parallel Port Interface
SPI
■ 1 Slave Select
USB
■ USB 2.0, 1 channel (Host & Device Selectable)
■ Supports 1.5/12/480 Mbps
GEU
■ Graphic Execution Unit
RSH
■ Supports Fully Hardware Rotator/ Scaler/ Halftone
SCAN/ IF
■ 1200 dpi CCD Sensor I/F
■ 1/2 channels AFE input (1 dedicated, 1 mixed)
■ Sensor MCLK Half Clock Control
LSU
■ 2 channels for dual beam
■ Test pattern generation
■ FSYNC generation
JPEG
■ Encoder 1 channel, decoder 1 channel
JBIG
■ 2 JBIG Compressor & 4 JBIG De-Compressor
Codec
■ 5 Halftone Compression/ Decompression Unit
■ Supports 32 bits AHF Master I/F
■ MH/ MR/ MMR encoder 1 channel
■ MH/ MR/ MMR decoder 1 channel
HCT
■ 1 channel encoder, 1 channel decoder
Engine Controller
■ PWM: 12 channel (dedicated 8 channels, mixed 4
channels)
■ Step Motor Controller
I2C Controller
■ 2 channels
■ I2C bus (SM bus) Slave Device Support (I2C version
2.1)
PLL
■ 3 PLLs (for Main/ PVC/ DDR)
DAC
■ 1 channel, 10 bits, 2 MSPS
ADC
■ 8 channel, 10 bits, 500 KSPS
Asic (CHRUS3) (continued)
Description Specifications