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PM73121 Datasheet(PDF) 63 Page - PMC-Sierra, Inc |
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PM73121 Datasheet(HTML) 63 Page - PMC-Sierra, Inc |
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63 / 223 page  PM73121 AAL1gator II PMC-Sierra, Inc. PMC-980620 ,VVXH AAL1 SAR Processor Data Sheet QSPQSD@U6S`Ã6I9Ã8PIAD9@IUD6GÃUPÃQH8TD@SS6ÃDI8Ã6I9ÃAPSÃDUTÃ8VTUPH@ST¶ÃDIU@SI6GÃVT@ CLAV signal will not be asserted again until the device is ready to accept an entire cell. If the FIFO is filling, TPHY_CLAV will be deasserted when there is room for only four more bytes of data. See Figure 29 and Figure 30 for the RUTOPIA transfer timing diagrams. 3.6 Receive Adaptation Layer Processor (RALP) The RALP moves data from the receive FIFO ATM cells in the RUTOPIA interface block to the external memory. The RALP does not verify the HEC because it expects a PHY layer device to verify the HEC before presenting the cell to the AAL1gator II. If SHIFT_VCI = 0, cells received with VCI(8) = 0 or Payload Type Indicator (PTI) = 4 to 7 are sent to the OAM queue and are stored using the pointers located in the OAM receive queue table. The head pointer is the address to the first cell received for each queue, and is usually maintained * Only used in MPHY mode ** For MPHY mode *** For SPHY mode Figure 29. RUTOPIA Start-of-Transfer Timing * Only used in MPHY mode ** For MPHY mode *** For SPHY mode Figure 30. RUTOPIA End-of-Transfer Timing D1 D2 D D3 TPHY_CLK(i) TPHY_ADDR(i)* TPHY_CLAV(o)** TPHY_CLAV*** TPHY_DATA(i) TPHY_SOC(i) /TPHY_EN(i) D47 D48 D49 D50 D51 D52 D53 TPHY_CLK(i) TPHY_ADDR(i)* TPHY_CLAV(o)** TPHY_CLAV*** TPHY_SOC TPHY_DATA(i) /TPHY_EN(i) |
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