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5220-DS02-R 数据表(PDF) 51 Page - Broadcom Corporation. |
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5220-DS02-R 数据表(HTML) 51 Page - Broadcom Corporation. |
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51 / 90 page ![]() Preliminary Data Sheet BCM5220 04/20/04 Broa d c om Co rp o r a t i o n Document 5220-DS04-405-R Auto-Negotiation Link Partner (LP) Next Page Transmit Register Page 39 100BASE-X AUXILIARY STATUS REGISTER FX Mode Returns a value derived from the SD± input pins. Returns 1 when SD+ are driven with a valid differential signal level. Returns 0 when both SD+ and SD- are simultaneously driven low. Locked The PHY returns a 1 in bit 9 when the descrambler is locked to the incoming data stream. Otherwise it returns a 0. Current 100BASE-X Link Status The PHY returns a 1 in bit 8 when the 100BASE-X link status is good. Otherwise it returns a 0. Remote Fault The PHY returns a 1 while its link partner is signalling a far-end fault condition. Otherwise it returns a 0. Table 18: 100BASE-X Auxiliary Status Register (Address 17d, 11h) Bit Name R/W Description Default 15:12 Reserveda a. Preserve existing values of reserved bits by completing a “Read/Modify Write.” RO Ignore when read 0 11 Reserveda RO Ignore when read 0 10 FX Mode RO 1 = 100BASE-FX mode 0 = 100BASE-TX or 10BASE-T mode PIN 9 Locked RO 1 = Descrambler locked 0 = Descrambler unlocked 0 8 Current 100BASE-X Link Status RO 1 = Link pass 0 = Link fail 0 7 Remote Fault RO 1 = Remote fault detected 0 = No remote fault detected 0 6 Reserveda RO Ignore when read 0 5 False Carrier Detected RO LH 1 = False carrier detected since last read 0 = No false carrier since last read 0 4 Bad ESD Detected RO LH 1 = ESD error detected since last read 0 = No ESD error since last read 0 3 Receive Error Detected RO LH 1 = Receive error detected since last read 0 = No receive error since last read 0 2 Transmit Error Detected RO LH 1 = Transmit error code received since last read 0 = No transmit error code received since last read 0 1 Lock Error Detected RO LH 1 = Lock error detected since last read 0 = No lock error since last read 0 0 MLT3 Code Error Detected RO LH 1 = MLT3 code error detected since last read 0 = No MLT3 code error since last read 0 Notes: R/W = Read/Write, RO = Read only, SC = Self Clear, LL = Latched Low, LH = Latched High, LL & LH Clear after read operation. Use default values of reserved bit(s) when writing to reserved bit(s). |
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