參數(shù)資料
    型號: X9410YV24I
    廠商: INTERSIL CORP
    元件分類: 數(shù)字電位計(jì)
    英文描述: Low Noise/Low Power/SPI Bus
    中文描述: DUAL 2.5K DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 64 POSITIONS, PDSO24
    封裝: 4.40 MM, TSSOP-24
    文件頁數(shù): 3/21頁
    文件大?。?/td> 123K
    代理商: X9410YV24I
    X9410
    Characteristics subject to change without notice.
    3 of 21
    REV 1.1 10/6/00
    www.xicor.com
    PIN NAMES
    DEVICE DESCRIPTION
    The X9410 is a highly integrated microcircuit
    incorporating two resistor arrays and their associated
    registers and counters and the serial interface logic
    providing direct communication between the host and
    the XDCP potentiometers.
    Serial Interface
    The X9410 supports the SPI interface hardware
    conventions. The device is accessed via the SI input
    with data clocked in on the rising SCK. CS must be
    LOW and the HOLD and WP pins must be HIGH during
    the entire operation.
    The SO and SI pins can be connected together, since
    they have three state outputs. This can help to reduce
    system pin count.
    Array Description
    The X9410 is comprised of two resistor arrays. Each
    array contains 63 discrete resistive segments that are
    connected in series. The physical ends of each array
    are equivalent to the fixed terminals of a mechanical
    potentiometer (V
    H
    /R
    H
    and V
    L
    /R
    L
    inputs).
    At both ends of each array and between each resistor
    segment is a CMOS switch connected to the wiper
    (V
    W
    /R
    W
    ) output. Within each individual array only one
    switch may be turned on at a time.
    These switches are controlled by a Wiper Counter
    Register (WCR). The six bits of the WCR are decoded
    to select, and enable, one of sixty-four switches.
    Wiper Counter Register (WCR)
    The X9410 contains two Wiper Counter Registers, one
    for each XDCP potentiometer. The WCR is equivalent
    to a serial-in, parallel-out register/counter with its
    outputs decoded to select one of sixty-four switches
    along its resistor array. The contents of the WCR can
    be altered in four ways: it may be written directly by the
    host via the Write Wiper Counter Register instruction
    (serial load); it may be written indirectly by transferring
    the contents of one of four associated Data Registers
    via the XFR Data Register or Global XFR Data
    Register instructions (parallel load); it can be modified
    one step at a time by the Increment/ Decrement
    instruction. Finally, it is loaded with the contents of its
    Data Register zero (DR0) upon power-up.
    The Wiper Counter Register is a volatile register; that
    is, its contents are lost when the X9410 is powered-
    down. Although the register is automatically loaded
    with the value in DR0 upon power-up, this may be
    different from the value present at power-down.
    Data Registers
    Each potentiometer has four 6-bit nonvolatile Data
    Registers. These can be read or written directly by the
    host. Data can also be transferred between any of the
    four Data Registers and the associated Wiper Counter
    Register. All operations changing data in one of the
    Data Registers is a nonvolatile operation and will take a
    maximum of 10ms.
    If the application does not require storage of multiple
    settings for the potentiometer, the Data Registers can
    be used as regular memory locations for system
    parameters or user preference data.
    Data Register Detail
    Symbol
    Description
    SCK
    S
    I
    , S
    A
    0
    V
    H0
    V
    L0
    /R
    L0
    –V
    L1
    /R
    L1
    V
    W0
    /R
    W0
    –V
    W1
    /R
    W1
    Serial Clock
    Serial Data
    Device Address
    Potentiometer Pins
    (terminal equivalent)
    Potentiometer Pin
    (wiper equivalent)
    Hardware Write Protection
    Analog Supplies
    System Supply Voltage
    System Ground
    No Connection
    O
    -A
    1
    /R
    H0
    –V
    H1
    /R
    H1
    ,
    WP
    V+,V-
    V
    CC
    V
    SS
    NC
    (MSB)
    D5
    NV
    (LSB)
    D0
    NV
    D4
    NV
    D3
    NV
    D2
    NV
    D1
    NV
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