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    參數(shù)資料
    型號: MCP4716A0T-E/CH
    廠商: Microchip Technology
    文件頁數(shù): 38/86頁
    文件大?。?/td> 0K
    描述: IC DAC 10BIT NV EEP I2C SOT-23-6
    標準包裝: 1
    設置時間: 6µs
    位數(shù): 10
    數(shù)據(jù)接口: EEPROM,I²C,串行
    轉(zhuǎn)換器數(shù)目: 1
    電壓電源: 單電源
    功率耗散(最大): 452mW
    工作溫度: -40°C ~ 125°C
    安裝類型: 表面貼裝
    封裝/外殼: SOT-23-6
    供應商設備封裝: SOT-23-6
    包裝: 標準包裝
    輸出數(shù)目和類型: 1 電壓,單極
    采樣率(每秒): *
    其它名稱: MCP4716A0T-E/CHDKR
    2011-2012 Microchip Technology Inc.
    DS22272C-page 43
    MCP4706/4716/4726
    5.0
    I2C SERIAL INTERFACE
    The MCP47X6 devices support the I2C serial protocol.
    The MCP47X6 I2C’s module operates in Slave mode
    (does not generate the serial clock).
    5.1
    Overview
    This I2C interface is a two-wire interface. Figure 5-1
    shows a typical I2C interface connection.
    The I2C interface specifies different communication bit
    rates. These are referred to as Standard, Fast or High-
    Speed modes. The MCP47X6 supports these three
    modes. The bit rates of these modes are:
    Standard mode: bit rates up to 100 kbit/s
    Fast mode: bit rates up to 400 kbit/s
    High-Speed mode (HS mode): bit rates up to
    3.4 Mbit/s
    A device that sends data onto the bus is defined as a
    transmitter, and a device receiving data as a receiver.
    The bus has to be controlled by a master device which
    generates the serial clock (SCL), controls the bus
    access and generates the Start and Stop conditions.
    The MCP47X6 device works as slave. Both master and
    slave can operate as transmitter or receiver, but the
    master device determines which mode is activated.
    Communication
    is
    initiated
    by
    the
    master
    (microcontroller) which sends the Start bit, followed by
    the slave address byte. The first byte transmitted is
    always the slave address byte, which contains the
    device code, the address bits, and the R/W bit.
    FIGURE 5-1:
    Typical I2C Interface.
    The I2C serial protocol only defines the field types, field
    lengths, timings, etc. of a frame. The frame content
    defines the behavior of the device. For details on the
    frame content (commands/data) refer to Section 6.0
    Refer to the NXP I2C document for more details on the
    I2C specifications.
    5.2
    Signal Descriptions
    The I2C interface uses up to two pins (signals). These
    are:
    SDA (Serial Data)
    SCL (Serial Clock)
    5.2.1
    SERIAL DATA (SDA)
    The Serial Data (SDA) signal is the data signal of the
    device. The value on this pin is latched on the rising
    edge of the SCL signal when the signal is an input.
    With the exception of the Start and Stop conditions, the
    high or low state of the SDA pin can only change when
    the clock signal on the SCL pin is low. During the high
    period of the clock, the SDA pin’s value (high or low)
    must be stable. Changes in the SDA pin’s value while
    the SCL pin is High will be interpreted as a Start or a
    Stop condition.
    5.2.2
    SERIAL CLOCK (SCL)
    The Serial Clock (SCL) signal is the clock signal of the
    device. The rising edge of the SCL signal latches the
    value on the SDA pin.
    The MCP47X6 will not stretch the clock signal (SCL)
    since memory read access occurs fast enough.
    Depending on the clock rate mode, the interface will
    display different characteristics.
    SCL
    MCP4XXX
    SDA
    Host
    Controller
    Typical I2C Interface Connections
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