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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PM7367 데이터시트(PDF) 72 Page - PMC-Sierra, Inc |
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PM7367 데이터시트(HTML) 72 Page - PMC-Sierra, Inc |
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72 / 323 page  PM7367 FREEDM-32P32 DATA SHEET PMC-1991499 ISSUE 2 FRAME ENGINE AND DATA LINK MANAGER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE 58 Figure 11 – Transmit Descriptor Table TDTB[31:4] = Tx Descriptor Table Base register TDR[13:0] = Transmit Descriptor Reference TD_ADDR[31:0] = Transmit Descriptor Address TDTB Bit 0 Bit 31 TD_ADDR TD1 TD2 TD 16384 Dword 0 Dword 1 Dword 2 Dword 3 TDTB[31:4] TDR[13:0] Bit 31 Bit 0 + = TD_ADDR[31:0] Dword 0 Dword 0 0000 0000 Dword 3 Dword 3 Transmit Queues Pointers to the transmit descriptors (TDs) containing packet(s) ready for transmission are passed from the host to the TMAC using the Transmit Descriptor Reference Ready (TDRR) queue, which resides in host memory. Pointers to transmit descriptor structures whose buffers have been read by the TMAC are passed from the TMAC to the host using the Transmit Descriptor Reference Free (TDRF) queue, which also resides in host memory. The TMAC contains a Free Queue cache which can store up to six TDRs. If caching is |
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