Ricoh 5510L - Sg3-D Board

14 June, 2002 PCBS
6-49
Detailed
Descriptions
6.4.6 SG3-D BOARD
The SG3 board allows up to two simultaneous communications when used in
combination with the FCU.
NCCP (New Communication Control Processor)
• Controls the SG3 board.
• CPU (RU30)
• DPRAM (Dual Port RAM): Handshaking with the FCU is done through this
block.
• DMA controller
• JBIG
• DSP V34 modem (RL5T892): Includes the DTMF Receiver function
• DCR for MH, MR, MMR, and JBIG compression and decompression
FROM
• 8M flash ROM for SG3 software storage and modem software storage
SDRAM
• 16M DRAM shared between ECM buffer, line buffer, and working memory
AFE (Analog Front End)
• Analog processing
CODEC (COder-DECoder)
• AD & DA conversions for modem
REG
• Supplies +3.3 V from +5V of the FCU
SG3-D
SG3-D
FCU
NCCP
FROM
(8Mbit)
SDRAM
(16Mbit)
CODEC NCU
REG
DSP
(modem)
DMAC
CPU
(Ru30)
JBIG
DCR
DPRAM
AFE
H310D945.WMF