Oki IP-6620 Maintenance Manual page 553

8.9.2 Performance description
Description of operation: USB/engine firmware functions block
The USB/engine firmware runs on the IPB5 board to control each section of the engine and USB
interface.
The following describes the main function blocks of the USB/engine firmware.
Operation panel driver:
USB driver:
Mechanical control driver:
Maintenance driver:
Temperature correction task:
Sensor monitoring task:
Setup task:
Flash driver:
Ink IC chip driver:
Error monitoring task:
Print task:
8-32
OKI Data Infotech Corporation CONFIDENTIAL
Controls I/O of the LCD, LED, button and buzzer on the
operation panel.
Controls the USB interface.
Controls the printing performance of the mechanical system
and also controls the various actuators to enable maintenance
of the ink system and control of the media heater.
Controls the serial interface for the maintenance console.
Monitors the thermistor.
Monitors the sensors.
Allows various operations via the operation panel, and prints
various built-in patterns.
Reads from and writes to the flash memory.
(CIS model)
Reads from and writes to the IC chip included in the ink
cartridge.
(LCIS model)
Reads from and writes to the IC ink amount extension chip.
Monitors sensors to check the engine anomalies.
Controls the band memory and print data.
Chapter 8 Operation Mechanism