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DETAILED SECTION DESCRIPTIONS
PCBs
1. FCIP (Facsimile Controller and Image Processor)
•
CPU (RU8 - Main CPU)
•
Modem (V.21, DTMF, and Tone generator)
•
Data compression and reconstruction (DCR)
•
Digital image processor (DIP)
•
Laser interface (LIF)
•
DMA controller
•
Clock generation (CKG)
•
Stepper motor control
•
Ringing signal detection
2. Modem (Rockwell R144EFXL)
•
V.17, V.29, V27ter modem
3. ROM
•
512 kB (4 Mbit) flash ROM for system software storage
4. SRAM
•
2 MB SRAM for system and user parameter storage
•
Backed up by the battery on the FCU
5. DRAM
•
1.5 MB DRAM shared between the Line Buffer, ECM Buffer, Page Mem-
ory, and SAF memory.
•
This DRAM is not backed up by the battery.
6. Video SRAM
•
512B SRAM for video processing
7. Oscillators
•
29.952 MHz oscillator for system clock generation
•
32.768 MHz oscillator for the real time clock. This is backed up by the
battery on the FCU
•
38.00053 MHz oscillator for the R144EFXL modem
•
27.801 MHz oscillator for the plotter clock to the LIF
2-30
July 30th, 1996
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