
1.4. OVERALL MACHINE CONTROL *
The FCE2 (Facsimile Control Engine) contains the FCIP (Facsimile Control
and Image Processor), DRAM, SRAM, System ROM, R144EFXL modem,
and video processing memory, and controls the entire system through the
FDU (Facsimile Driver Unit).
There are two cpus in the machine: the main cpu (FCIP) on the FCE and the
energy saver cpu on the FDU. In energy saver mode, the main CPU switches
off and the energy saver CPU takes over.
The FCIP consists of the following component blocks:
•
MDM - Modem
•
RU8 CPU - Main CPU
•
DMAC - DMA Controller
•
LIF- Laser Interface
•
DIP - Digital Image Processor
•
PRIF - Printer Interface
•
DCR - Data Compression and Reconstruction
The modem inside the FCIP is used for V.29, V27.ter, and V.21 communica-
tions. In addition, the Rockwell R144EFXL modem is used for V.17 and V.33
communications.
The 1.5 MB DRAM contains the SAF memory, ECM buffer memory, work
area, and page memory. The SAF memory can be extended by 2 or 4 Mbytes
with an IC card.
A 512 kB (4 Mbit) flash ROM is used for the system ROM. Software in this
ROM can be rewritten from the IC card slot or by RDS. Another 128 kB mask
ROM contains LCD wording data.
Contact
Image
Sensor
Amplifier
Optional
100 Sheet
Cassette
Optional
Printer I/F
Energy
Saver
CPU
Drivers
(FPD)
Driver
LDDR
Thermistor
Tx
and
paper
feed
motors
Scanner
and
printer
components
and
sensors
Operation
Panel
Sensors
Optional
Counter
Power
Pack
Speaker
NCU
Handset
Control Signals
External I/O (EXIO)
DC-DC
Converter
Hybrid IC
(HIC)
PSU
Fusing
Lamp
FDU
System
ROM
(Flash)
System
RAM
(SRAM)
DRAM
DATA/ADDRESS BUS
Optional
RS232C I/F
Video
SRAM
Working
RAM
ECM/SAF
Memory
R144EFXL
Modem
Optional
IC Card
Page
Memory
FCE2
FCIP
H516V506.wmf
August 2nd, 1995
OVERALL MACHINE INFORMATION
OVERALL MACHINE CONTROL *
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