Ricoh B064 SERIES Service Manual page 1448

BOARDS
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
• 1Mbyte flash ROM for SG3 software storage and modem software storage
SDRAM
• 4Mbyte DRAM shared between ECM buffer, line buffer, and working memory
AFE (Analog Front End)
• Analog processing
CODEC (COder-DECoder)
• A/D & D/A conversions for modem
REG
• Generates +3.3 V from the +5V from the FCU
B819/B820
CÓPIA NÃO CONTROLADA
138
CÓPIA NÃO CONTROLADA
SM