BOARDS
21 December, 2001
4-2
4.2 BOARDS
4.2.1 FCU
The FCU (Facsimile Control Unit) controls fax communications, the video interface
to the base copier’s engine, and all the fax options.
FACE2 (Fax Application Control Engine)
•
CPU
•
Data compression and reconstruction (DCR)
•
DMA control
•
Clock generation
•
DRAM backup control
•
Ringing signal/tone detection
FBI (FACE Bridge Interface)
•
Interface between the PCI bus and the FACE
•
DMA control
Modem (R288F-29)
•
V.34, V33, V17, V.29, V.27ter, V.21, and V.8
SG3
ISDN
SRAM
(256 kB)
Flash ROM
(2 MB)
Analog
Circuit
V.34
MODEM
Monitor
Speaker
NCU
Function
Upgrade
Unit
(512 kB)
DIMM
(32 MB)
DRAM
(8 MB)
FBI
CPU BUS
DMA BUS
FCUIF
VIF
DCR
CPU
(RU30)
FACE2
MBU
G307D510.WMF