wiki:Software/Firmware/Framework/R3_arch/outline/blk_spec/pkt/rx/mctl

Memory Controller

Figure 1 - Memory Controller IO



Table 1 - Rx Application Interface

Signal Name In/Out?Width Description
app_sof In 1 Start-of-frame signal, indicating first word of application data
app_eof In 1 End-of-frame signal, indicating last word of application data
app_data In 32 Application data
app_data_en In 1 Active High, data enable signal
app_rdy Out 1 memory ready signal. Active High, when '1' memory is ready to receive data


Table 2 - RMAP Processor Interface

Signal Name In/Out?Width Description
rmap_req In 1 Active high. Signal requesting access to memory
rmap_ack Out 1 Request grant signal, active high
rmap_sof In 1 Start-of-frame signal, indicating first word of rmap read data
rmap_eof In 1 End-of-frame signal, indicating last word of rmap read data
rmap_data In 32 rmap data
rmap_data_en In 1 rmap data enable, active High


Table 3 - Command Generator Interface

Signal Name In/Out?Width Description
buf_valid Out 1 Buffer ready signal, indicates that data is available for transmission over ethernet port
buf_ptr Out 16 Pointer to buffer location
buf_size Out 16 Size of buffer data in bytes


Table 4 - Memory Interface

Signal Name In/Out?Width Description
mem_addr Out 14 Memory address signals
mem_data Out 32 Memory data signals
me_we Out 1 Memory write enable


Table 5 - Tx Ethernet Interface

Signal Name In/Out?Width Description
tx_done In 1 Ethernet payload transmit done signal, active high
tx_size In 16 Ethernet payload size, this signal is used to subtract the current read pointer to point to next buffer read location


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Last modified 7 years ago Last modified on 06/18/10 14:32:26

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