2.4. PCBs
2.4.1. FCE
1. FCIP (Facsimile Controller and Image Processor)
•
CPU
•
Modem (V.29, V.27, V.21)
•
Data compression and reconstruction
•
Digital image processor
•
Laser interface
•
DMA controller
•
Clock generation
•
Stepper motor control
•
Serial interface to the FDU
•
DRAM backup control
•
Ringing signal/Tone detection
•
Fusing lamp control
2. ROM
•
512 kB (4 Mbit) flash ROM for system software storage.
FCE
DATA/ADDRESS BUS
SRAM
(32kB)
DRAM
(1024kB)
Flash ROM
(512kB)
Video SRAM
(8kB)
+12VP
+5V
Battery
+5V
IC6
FCIP
32.768kHz
29.952MHz
Parallel IO
IC Page Memory Card
RS232C Interface (Optional)
FDU
+5VBAT
Serial IO
h521d630.wmf
May 22nd, 1995
DETAILED SECTION DESCRIPTIONS
PCBs
2-71