SMC Networks SMC91C95 FIGURE 16 - MMU PACKET NUMBER FLOW AND RELEVANT REGISTERS

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FIGURE 16 - MMU PACKET NUMBER FLOW AND RELEVANT REGISTERS
TX FIFO
COMPLETION
FIFO
RX FIFO
CSMA/CD
LOGICAL
ADDRESS
PACKET #
MMU
PHYSICAL ADDRESS
RAM
CPU ADDRESS CSMA ADDRESS
RX PACKET
NUMBER
RX FIFO
PACKET NUMBER
PACKET NUMBER
REGISTER
PACK # OUT
TX DONE
PACKET NUMBER
ALLOCATION
RESULT REGISTER
ALLOCATE
RELEASE
PACK # OUT
DMA
RDWR
TX
DECODER
MMU
COMMAND REGISTER
ALLOCATE RELEASE