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XRT86VL34 датащи(PDF) 38 Page - Exar Corporation |
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XRT86VL34 датащи(HTML) 38 Page - Exar Corporation |
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38 / 156 page ![]() XRT86VL34 33 QUAD T1/E1/J1 FRAMER/LIU COMBO - T1 REGISTER DESCRIPTION REV. V1.2.0 TABLE 18: RECEIVE DATA LINK BYTE COUNT REGISTER (RDLBCR1) HEX ADDRESS: 0Xn115 BIT FUNCTION TYPE DEFAULT DESCRIPTION-OPERATION 7 RBUFPTR R/W 0 Receive HDLC1 Buffer-Pointer This bit Identifies which Receive HDLC1 buffer contains the most recently received HDLC1 message. 0 - Indicates that Receive HDLC1 Buffer # 0 contains the contents of the most recently received HDLC message. 1 - Indicates that Receive HDLC1 Buffer # 1 contains the contents of the most recently received HDLC message. 6-0 RDLBC[6:0] R/W 0000000 Receive HDLC Message - byte count The exact function of these bits depends on whether the Receive HDLC Controller Block #1 is configured to receive MOS or BOS messages. In BOS Mode: These seven bits contain the number of repetitions the BOS mes- sage must be received before the Receive HDLC1 controller gener- ates the Receive End of Transfer (RxEOT) interrupt. If these bits are set to “0000000”, the message will be received indefinitely and no Receive End of Transfer (RxEOT) interrupt will be generated. In MOS Mode: These seven bits contain the size in bytes of the HDLC1 message that has been received and written into the Receive HDLC buffer. The length of MOS message shown in these bits include header bytes such as the SAPI, TEI, Control field, AND the FCS bytes. |
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