參數資料
    型號: MCP4232T-502E/UN
    廠商: Microchip Technology
    文件頁數: 22/59頁
    文件大?。?/td> 0K
    描述: IC RHEOSTAT 5K 2CH 10-MSOP
    標準包裝: 2,500
    接片: 129
    電阻(歐姆): 5k
    電路數: 2
    溫度系數: 標準值 150 ppm/°C
    存儲器類型: 易失
    接口: 4 線 SPI(芯片選擇)
    電源電壓: 1.8 V ~ 5.5 V
    工作溫度: -40°C ~ 125°C
    安裝類型: 表面貼裝
    封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
    供應商設備封裝: 10-MSOP
    包裝: 帶卷 (TR)
    其它名稱: MCP4232T-502-E/UN
    MCP4232T-502-E/UNTR
    MCP4232T-502-E/UNTR-ND
    MCP4232T-502E/UNTR
    Micrel, Inc.
    KSZ8051MNL/RNL
    July 2010
    29
    M9999-070910-1.0
    Interrupt (INTRP)
    INTRP (pin 21) is an optional interrupt signal that is used to inform the external controller that there has been a status
    update to the KSZ8051MNL/RNL PHY register. Register 1Bh, bits [15:8] are the interrupt control bits to enable and
    disable the conditions for asserting the INTRP signal. Register 1Bh, bits [7:0] are the interrupt status bits to indicate which
    interrupt conditions have occurred. The interrupt status bits are cleared after reading register 1Bh.
    Register 1Fh, bit 9 sets the interrupt level to active high or active low. The default is active low.
    The MII management bus option gives the MAC processor complete access to the KSZ8051MNL/RNL control and status
    registers. Additionally, an interrupt pin eliminates the need for the processor to poll the PHY for status change.
    HP Auto MDI/MDI-X
    HP Auto MDI/MDI-X configuration eliminates the confusion of whether to use a straight cable or a crossover cable
    between the KSZ8051MNL/RNL and its link partner. This feature allows the KSZ8051MNL/RNL to use either type of cable
    to connect with a link partner that is in either MDI or MDI-X mode. The auto-sense function detects transmit and receive
    pairs from the link partner, and then assigns transmit and receive pairs of the KSZ8051MNL/RNL accordingly.
    HP Auto MDI/MDI-X is enabled by default. It is disabled by writing a one to register 1Fh, bit 13. MDI and MDI-X mode is
    selected by register 1Fh, bit 14 if HP Auto MDI/MDI-X is disabled.
    An isolation transformer with symmetrical transmit and receive data paths is recommended to support auto MDI/MDI-X.
    The IEEE 802.3 Standard defines MDI and MDI-X as follows:
    MDI
    MDI-X
    RJ-45 Pin
    Signal
    RJ-45 Pin
    Signal
    1
    TX+
    1
    RX+
    2
    TX-
    2
    RX-
    3
    RX+
    3
    TX+
    6
    RX-
    6
    TX-
    Table 6. MDI/MDI-X Pin Definition
    Straight Cable
    A straight cable connects a MDI device to a MDI-X device, or a MDI-X device to a MDI device. The following figure depicts
    a typical straight cable connection between a NIC card (MDI) and a switch, or hub (MDI-X).
    Figure 6. Typical Straight Cable Connection
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