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PM7366-PI 데이터시트(PDF) 267 Page - PMC-Sierra, Inc |
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PM7366-PI 데이터시트(HTML) 267 Page - PMC-Sierra, Inc |
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267 / 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 254 Figure 30 – PCI Target Disconnect PCICLK FRAMEB 123 45 6 T STOPB DEVSELB The PCI Target Abort Diagram (Figure 31) illustrates the case when the target wants to abort the current cycle. Note, when the FREEDM-8 is the target, it never aborts the current cycle. A target abort is an indication of a serious error and no data is transferred. A target can terminate the current cycle by asserting STOPB and negating DEVSELB. If the FREEDM-8 is the initiator and the target aborts the current access, the abort condition is reported to the PCI Host. During clock 1, a cycle is in progress. During clock 2, the target negates DEVSELB and TRDYB and asserts STOPB to indicate an abort condition to the initiator. During clock 3, the initiator negates FRAMEB in response to the abort request. During clock 4, the target negates STOPB signal in response to the FRAMEB signal being negated. Figure 31 – PCI Target Abort PCICLK FRAMEB 123 45 6 T TRDYB DEVSELB STOPB |
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