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PM7367 датащи(PDF) 143 Page - PMC-Sierra, Inc |
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PM7367 датащи(HTML) 143 Page - PMC-Sierra, Inc |
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143 / 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 129 CRC[1:0]: The CRC algorithm bits (CRC[1:0]) configures the HDLC processor to perform CRC verification on the incoming data stream. The value of CRC[1:0] to be written to the channel provision RAM, in an indirect channel write operation, must be set up in this register before triggering the write. CRC[1:0] is ignored when DELIN is low. CRC[1:0] reflects the value written until the completion of a subsequent indirect channel read operation. Table 16 – CRC[1:0] Settings CRC[1] CRC[0] Operation 0 0 No Verification 0 1 CRC-CCITT 1 0 CRC-32 1 1 Reserved PROV: The indirect provision enable bit (PROV) reports the channel provision enable flag read from the channel provision RAM after an indirect channel read operation has completed. The provision enable flag to be written to the channel provision RAM, in an indirect write operation, must be set up in this register before triggering the write. When PROV is set high, the HDLC processor will process data on the channel specified by CHAN[4:0]. When PROV is set low, the HDLC processor will ignore data on the channel specified by CHAN[4:0]. PROV reflects the value written until the completion of a subsequent indirect channel read operation. |
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