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AM79C960KC датащи(PDF) 67 Page - Advanced Micro Devices |
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AM79C960KC датащи(HTML) 67 Page - Advanced Micro Devices |
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67 / 127 page ![]() P R E L I M I N A R Y AMD 1-409 Am79C960 controller will store incoming frame data. Read/write accessible only when STOP bit is set. CSR24-25: Base Address of Receive Ring Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 BADR Contains the base address of the Receive Ring. Read/write accessible only when STOP bit is set. CSR26-27: Next Receive Descriptor Address Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 NRDA Contains the next RDRE address pointer. Read/write accessible only when STOP bit is set. CSR28-29: Current Receive Descriptor Address Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 CRDA Contains the current RDRE ad- dress pointer. Read/write accessible only when STOP bit is set. CSR30-31: Base Address of Transmit Ring Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 BADX Contains the base address of the Transmit Ring. Read/write accessible only when STOP bit is set. CSR32-33: Next Transmit Descriptor Address Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 NXDA Contains the next TDRE address pointer. Read/write accessible only when STOP bit is set. CSR34-35: Current Transmit Descriptor Address Bit Name Description 31-24 RES Reserved locations. Written as zero and read as undefined. 23-0 CXDA Contains the current TDRE ad- dress pointer. Read/write accessible only when STOP bit is set. CSR36-37: Next Next Receive Descriptor Address Bit Name Description 31-0 NNRDA Contains the next next RDRE ad- dress pointer. Read/write accessible only when STOP bit is set. CSR38-39: Next Next Transmit Descriptor Address Bit Name Description 31-0 NNXDA Contains the next next TDRE ad- dress pointer. Read/write accessible only when STOP bit is set. CSR40-41: Current Receive Status and Byte Count Bit Name Description 31-24 CRST Current Receive Status. This field is a copy of bits 15:8 of RMD1 of the current receive descriptor. |
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