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DP83821 датащи(PDF) 64 Page - National Semiconductor (TI) |
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DP83821 датащи(HTML) 64 Page - National Semiconductor (TI) |
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64 / 86 page ![]() 64 www.national.com 4.0 Register Set (Continued) 4.2.26 Management Information Base Control Register The MIBC register is used to control access to the statistics block and the warning bits and to control the collection of management information statistics. Tag: MIBC Size: 32 bits Hard Reset: 00000002h Offset: 005ch Access: Read Write Soft Reset: 00000002h bit tag description usage 31-4 unused 3 MIBS MIB Counter Strobe Writing a 1 to this bit location causes the counters in all enabled blocks to increment by 1, providing a single-step test function. The MIBS bit is always read back as 0. This bit is used for test purposes only and should be set to 0 for normal counter operation. 2 ACLR Clear all counters When set to a 1, this bit forces all counters to be reset to 0. This bit is always read back as 0. 1 FRZ Freeze all counters When set to a 1, this bit forces count values to be frozen such that a read of the statistic block will represent management statistics at a given instant in time. When set to 0, the counters will increment normally and may be read individually while counting. 0 WRN Warning Test Indicator This field is read only. This bit is set to 1 when all statistic counters have reached their respective overflow warning condition. WRN will be cleared after one or more of the statistic counters have been cleared. |
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