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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PM7366-PI 데이터시트(PDF) 59 Page - PMC-Sierra, Inc |
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PM7366-PI 데이터시트(HTML) 59 Page - PMC-Sierra, Inc |
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59 / 286 page  RELEASED PM7366 FREEDM-8 DATA SHEET PMC-1970930 ISSUE 4 FRAME ENGINE AND DATA LINK MANAGER PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 46 Figure 7 – RPDRR Queue Operation Rx Packet Descriptor Reference Ready Queue Bit 0 Bit 31 STATUS + RPDR RPDRRQ_START_ADDR RPDRRQ_END_ADDR RPDRRQ_READ_ADDR RPDRRQ_WRITE_ADDR STATUS + RPDR STATUS + RPDR RPD - 16 bytes RPD - 16 bytes RPD - 16 bytes RPD - 16 bytes RPD - 16 bytes buffer -packet M buffer -packet N buffer -start of packet O buffer -middle of packet O buffer -end of packet O Receive Channel Descriptor Reference Table On a per-channel basis, the RMAC caches information such as the current DMA information in a Receive Channel Descriptor Reference (RCDR) Table. The RMAC can process 128 channels and stores three dwords of information per channel. This information is cached internally in order to decrease the number of host bus accesses required to process each data packet. The structure of the RCDR table is shown in Figure 8. |
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