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データシートサーチシステム |
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DP83902AVF データシート(PDF) 20 Page - National Semiconductor (TI) |
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DP83902AVF データシート(HTML) 20 Page - National Semiconductor (TI) |
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20 / 70 page  70 Packet Reception (Continued) BUFFER RECOVERY FOR REJECTED PACKETS If the packet is a runt packet or contains CRC or Frame Alignment errors it is rejected The buffer management log- ic resets the DMA back to the first buffer page used to store the packet (pointed to by CURR) recovering all buffers that had been used to store the rejected packet This operation will not be performed if the ST-NIC is programmed to accept either runt packets or packets with CRC or Frame Alignment errors The received CRC is always stored in buffer memory after the last byte of received data for the packet Error Recovery If the packet is rejected as shown the DMA is restored by the ST-NIC by reprogramming the DMA starting address pointed to by the Current Page Register Termination of Receive PacketPacket Reject TLF11157 – 15 20 |
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