Sg3 Board - Gestetner B003 Service Manual

BOARDS

4.2.4 SG3 BOARD

FCU
The SG3 board allows up to two simultaneous communications when used in
combination with the FCU.
CCP (Communication Control Processor)
• Controls the SG3 board.
• CPU (RU8)
• DPRAM (Dual Port RAM): Handshaking with the FCU is done through this
block.
• DMA controller
• JBIG interface
Flash ROM
• 512KB (4 Mbit) flash ROM for SG3 software storage.
• 512KB (4 Mbit) flash ROM for Panasonic modem software storage.
DRAM
• 512 KB DRAM shared between ECM buffer, line buffer, and working
memory.
QM coder
• QM coder for JBIG compression and decompression.
V.34 Modem
• Panasonic V.34 modem (MN195003MFL)
B003/B004/B006/B007
CCP
CPU
DPRAM DMAC JBIGIF TONE
(RU8)
DATA/ADDRESS BUS
Flash ROM
DRAM
(4MB)
(4MB)
Program
DTMF
Receiver
MN195003MFL
Modem
JBIG
M65761
4-6
Standard
NCU
Hybrid IC
Flash ROM
(4MB)
Modem
SG3-V.34
B360D513.WMF
SM