System Memory
Used as a Printing buffer for printing, a Scan buffer for scanning, a ECM Buffer for System
Working Area.
▪ Type DDR2 SDRAM
▪ Bus 16-bit 166MHz
▪ Size 128 MB
CRU Control
Used to store the printing and operating information into a Security EEPROM in 4 CRUs, Y,M,C
and K Imaging Cartridge, respectively by the CHORUS3.
▪ Access I2C Bus Ch.100 KHz
▪ Security Size 2K-bit
System Information Control
Used to store the system operating information needed at printing into a EEPROM in the Main Controller by
the CHORUS3.
▪ Access I2C Bus Ch.1 400KHz
▪ EEPROM Size 64Kbit
OPE Interface
Used to control the OPE by the CHORUS 3 and the UART interface is used to communicate between the
both.
I/O Port
Used to receive or transmit some data from/to the Host.
▪ USB Device USB2.0 High speed 480Mbps
▪ Network Ethernet 10/100-Base Tx
Engine Control
Used to control all parts to be required at printing by the CHORUS 3.
▪ Sensors Paper Empty
Paper Registration
Waste Toner Bottle
Paper Exit
Temperature sensors
Bin-Full
Etc.
▪ Clutches(Solenoid) Paper Pick Up
Paper Registration
Etc.
▪ Motor 1 BLDC
▪ LSU
▪ Fuser Control the Fuser’s temperature
▪ HVPS Control the high voltage outputs
▪ ADC Reading the Fuser’s temperature and the high voltage outputs’ feedback
▪ Cover Open Sensing
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