Oki PACEMARK 4410, Service Handbook

Page: 19 / 189

40496501TH Draft Version
19
(7) NHDC LSI(IC27: TC190G08CF-7036)
This LSI controls timer, interruption, memories, printing, external interface, motor drive
interface.
(a) Timer control
It controls the watchdog timer for detecting any out-of-control program, baud rate
generator for setting the baud rate of the serial interface, and pulse generation timer for
AG plus count.
(b) Interruption control
It controls LSI inside interruptions, external interruptions and interruptions from an
external interface as outputs for the MPU.
(c) Memory control
DRAM and SRAM control, chip select output control of ROM, flash memory and MUPIS,
and bank switch control for expanding their memory spaces.
(d) Print control
It creates a print timing corresponding to the print DPI to control the possition and print
correction for pins.
This also controls the print Mask and DMAC which reads print data from the memory and
transmits it to the print output buffer.
(e) External interface
It controls various interfaces for main LSI, IEEE1284, serial, MUPIS, OpePaneLSI,
EEPROM.
(f) Motor drive interface
Each control of OVDV pulse generation for AG motor, generation of pulse for switching
ribbon motor phase, and OVDV pulse generation for LF motor.
(8) Sub LSI (IC17, IC18: MSM72V017)
This LSI is the I/O port LSI which controls the input/output of various controlling signals with
command inputs from the MPU.
(a) Sub LSI #1 (IC17: MSM72V017)
Input/output control for controlling signals to various sensors, FAN controlling signals,
sensor slice level controlling signals, AG motor controlling signals, and LF motor
controlling signals.
(b) Sub LSI #2 (IC18: MSM72V017)
Input/output control for controlling signals to various sensors, SP motor current control-
ling signals, external interface controlling signals, TR motor controlling signals, bail motor
controlling signals, cutter motor (for optional connection) controlling signals.
(9) Serial I/F LSI (IC35: 85L30)
This LSI is the serial I/F LSI which controls the input/output of serial I/F controlling signals with
command inputs from the MPU.