Sg3 Board; Nccp (New Communication Control Processor); From; Sdram - Ricoh B205 Service Manual

Hide thumbs Also See for B205:

Table of Contents

5.2.3 SG3 BOARD

The SG3 board allows up to three simultaneous communications when used in

combination with the FCU and optional G3 boards. The NCU is on the same board

as the common SG-3 board. This makes the total board structure smaller. But, the

specifications of the SG3 board do not change.

• Controls the SG3 board.

• CPU (RU30)

• DPRAM (Dual Port RAM): Handshaking with the FCU is done through this block.

• DMA controller

DSP V34 modem (RL5T892): Includes the DTMF Receiver function

DCR for MH, MR, MMR, and JBIG compression and decompression

• 1Mbyte flash ROM for SG3 software storage and modem software storage

• 4Mbyte DRAM shared between ECM buffer, line buffer, and working memory

• Analog processing

• A/D & D/A conversions for modem

• Generates +3.3 V from the +5V from the FCU

B766D903.WMF

Table of Contents

B209 D007 D008