參數(shù)資料
      型號(hào): LU3X34FTR-HS128-DB
      英文描述: Quad 3 V 10/100 Ethernet Transceiver TX/FX
      中文描述: 四3伏10/100以太網(wǎng)收發(fā)器德克薩斯州/外匯
      文件頁數(shù): 29/52頁
      文件大?。?/td> 678K
      代理商: LU3X34FTR-HS128-DB
      Lucent Technologies Inc.
      29
      Preliminary Data Sheet
      July 2000
      LU3X34FTR
      Quad 3 V 10/100 Ethernet Transceiver TX/FX
      Functional Description
      (continued)
      Autonegotiation and Speed Configuration
      The four sets of five pins listed in Table 13 configure the speed capability of each channel of LU3X34FTR. The
      logic state of these pins, at powerup or reset, is latched into the advertisement register (register address 04h) for
      autonegotiation purposes. These pins are also used for evaluating the default value in the base mode control reg-
      ister (register 00h) according to Table 12.
      Table 12. Autonegotiation
      LED Configuration
      The LU3X34FTR provides four LED output pins for each of its four ports. In addition to the default functions associ-
      ated with their pin names, there are several registers that allow users to customize LED operations.
      Register 11h (programmable LED register) at PHY address 2 implements even more flexible LED configurations.
      Register 11h at PHY address 4 controls all even-numbered ports, and register 11h at address 5 controls all odd-
      numbered ports. Via the programmable LED register, each of the LEDs may be configured to operate in one of the
      following modes: link, speed, duplex, receive, transmit, solid when link is up and blinks during activity, remote fault,
      and collision. Bits [0:3] in these registers allow the user to invert the on/off logic for each of these four programma-
      ble LEDs individually.
      Note that all LED circuits are switched under the control of the programmable LED register whenever the content of
      register 11h differs from its default value.
      Register 17h implements more LED configuration functions. With these registers, unused LED can be individually
      turned off to reduce power consumption.
      Fiber Mode Select
      A logic one level on pins FOSEL[0:3] sets each channel in fiber mode individually. These pins are latched during
      reset operation.
      MII Registers
      The LU3X34FTR has four independent PHYs in it. Each PHY has its own identical set of registers as tabulated
      below. The PHY address differentiates which PHY to be read or written into. The following tables of registers are
      applicable to each register.
      Configuration Pins at Reset
      Registers Initial Value
      ANEN
      FD100
      (bit 4.8)
      1
      0
      0
      0
      0
      X
      HD100
      (bit 4.7)
      X
      1
      1
      0
      0
      X
      FD10
      (bit 4.6)
      X
      1
      0
      1
      0
      X
      HD10
      (bit 4.5)
      X
      X
      X
      X
      1
      X
      AUTONEG
      reg 0.12
      0
      0
      0
      0
      0
      1
      SPEED
      reg 0.13
      1
      1
      1
      0
      0
      0
      DUPLEX
      reg 0.8
      1
      1
      0
      1
      0
      0
      0
      0
      0
      0
      0
      1
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