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LXT972A Datasheet PDF : 70 Pages
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LXT972A — 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet
9
Carrier Sense, Loopback, and Collision Conditions............................................ 28
10 4B/5B Coding ...................................................................................................... 33
11 BSR Mode of Operation ...................................................................................... 39
12 Supported JTAG Instructions .............................................................................. 39
13 Device ID Register .............................................................................................. 39
14 Magnetics Requirements .................................................................................... 40
15 RJ-45 Pin Comparison of NIC and Switch Twisted-Pair Interfaces .................... 40
16 Absolute Maximum Ratings ................................................................................ 44
17 Operating Conditions .......................................................................................... 44
18 Digital I/O Characteristics 1................................................................................. 45
19 Digital I/O Characteristics - MII Pins ................................................................... 45
20 I/O Characteristics - REFCLK/XI and XO Pins.................................................... 45
21 I/O Characteristics - LED/CFG Pins.................................................................... 45
22 100BASE-TX Transceiver Characteristics .......................................................... 46
23 10BASE-T Transceiver Characteristics............................................................... 46
24 10BASE-T Link Integrity Timing Characteristics ................................................. 46
25 100BASE-TX Receive Timing Parameters - 4B Mode........................................ 47
26 100BASE-TX Transmit Timing Parameters - 4B Mode ....................................... 48
27 10BASE-T Receive Timing Parameters.............................................................. 49
28 10BASE-T Transmit Timing Parameters............................................................. 50
29 10BASE-T Jabber and Unjabber Timing Parameters ......................................... 51
30 10BASE-T SQE Timing Parameters ................................................................... 51
31 Auto Negotiation and Fast Link Pulse Timing Parameters.................................. 52
32 MDIO Timing Parameters ................................................................................... 53
33
Power-Up Timing Parameters............................................................................ 54
34
RESET Pulse Width and Recovery Timing Parameters .................................... 54
35 Register Set ........................................................................................................ 55
36 Register Bit Map.................................................................................................. 56
37 Control Register (Address 0)............................................................................... 58
38 MII Status Register #1 (Address 1) ..................................................................... 58
39 PHY Identification Register 1 (Address 2)........................................................... 59
40 PHY Identification Register 2 (Address 3)........................................................... 60
41 Auto Negotiation Advertisement Register (Address 4)........................................ 61
42 Auto Negotiation Link Partner Base Page Ability Register (Address 5) .............. 62
43 Auto Negotiation Expansion (Address 6) ............................................................ 63
44 Auto Negotiation Next Page Transmit Register (Address 7) ............................... 63
45 Auto Negotiation Link Partner Next Page Receive Register (Address 8) ........... 64
46 Configuration Register (Address 16, Hex 10) ..................................................... 64
47 Status Register #2 (Address 17) ......................................................................... 65
48 Interrupt Enable Register (Address 18)............................................................... 66
49 Interrupt Status Register (Address 19, Hex 13) .................................................. 66
50 LED Configuration Register (Address 20, Hex 14) ............................................. 68
51 Transmit Control Register #2 (Address 30)......................................................... 69
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