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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LAN8740 датащи(PDF) 75 Page - Microchip Technology |
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LAN8740 датащи(HTML) 75 Page - Microchip Technology |
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75 / 136 page  2013-2015 Microchip Technology Inc. DS00001987A-page 75 LAN8740A/LAN8740Ai 4.2.16 TDR CONTROL/STATUS REGISTER Index (In Decimal): 25 Size: 16 bits Bits Description Type Default 15 TDR Enable 0 = TDR mode disabled 1 = TDR mode enabled Note: This bit self clears when TDR completes (TDR Channel Status goes high) R/W NASR SC 0b 14 TDR Analog to Digital Filter Enable 0 = TDR analog to digital filter disabled 1 = TDR analog to digital filter enabled (reduces noise spikes during TDR pulses) R/W NASR 0b 13:11 RESERVED RO - 10:9 TDR Channel Cable Type Indicates the cable type determined by the TDR test. 00 = Default 01 = Shorted cable condition 10 = Open cable condition 11 = Match cable condition R/W NASR 00b 8 TDR Channel Status When high, this bit indicates that the TDR operation has completed. This bit will stay high until reset or the TDR operation is restarted (TDR Enable = 1) R/W NASR 0b 7:0 TDR Channel Length This eight bit value indicates the TDR channel length during a short or open cable condition. Refer to Section 3.8.11.1, "Time Domain Reflectometry (TDR) Cable Diagnostics" for additional information on the usage of this field. Note: This field is not valid during a match cable condition. The Cable Length Register must be used to determine cable length during a non-open/short (match) condition. Refer to Section 3.8.11, "Cable Diagnostics" for additional information. R/W NASR 00h |
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