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    參數(shù)資料
    型號: X24042P-3
    英文描述: IC AMP CURRENT SENSE SOT-23-6
    中文描述: 串行E2PROM
    文件頁數(shù): 7/15頁
    文件大小: 62K
    代理商: X24042P-3
    X24042
    7
    BUS ACTIVITY:
    MASTER
    SDA LINE
    BUS ACTIVITY:
    X24042
    S
    T
    A
    R
    T
    SLAVE
    ADDRESS
    S
    S
    T
    O
    P
    P
    A
    C
    K
    DATA
    READ OPERATIONS
    Read operations are initiated in the same manner as
    write operations with the exception that the R/W bit of the
    slave address is set to a one. There are three basic read
    operations: current address read, random read and
    sequential read.
    It should be noted that the ninth clock cycle of the read
    operation is not a “don’t care.” To terminate a read
    operation, the master must either issue a stop condition
    during the ninth cycle or hold SDA HIGH during the ninth
    clock cycle and then issue a stop condition.
    Current Address Read
    Internally the X24042 contains an address counter that
    maintains the address of the last word accessed,
    incremented by one. Therefore, if the last access (either
    a read or write) was to address n, the next read operation
    would access data from address n + 1. Upon receipt of
    the slave address with R/
    W
    set to one, the X24042
    issues an acknowledge and transmits the eight bit word.
    The read operation is terminated by the master; by not
    responding with an acknowledge and by issuing a stop
    condition. Refer to Figure 7 for the sequence of address,
    acknowledge and data transfer.
    Random Read
    Random read operations allow the master to access any
    memory location in a random manner. Prior to issuing
    the slave address with the R/
    W
    bit set to one, the master
    must first perform a “dummy” write operation. The mas-
    ter issues the start condition, and the slave address
    followed by the word address it is to read. After the word
    address acknowledge, the master immediately reissues
    the start condition and the slave address with the R/
    W
    bit
    set to one. This will be followed by an acknowledge from
    the X24042 and then by the eight bit word. The read
    operation is terminated by the master; by not responding
    with an acknowledge and by issuing a stop condition.
    Refer to Figure 8 for the address, acknowledge and data
    transfer sequence.
    Figure 7. Current Address Read
    3849 FHD F13
    Figure 8. Random Read
    3849 FHD F14
    BUS ACTIVITY:
    MASTER
    SDA LINE
    BUS ACTIVITY:
    X24042
    S
    T
    A
    R
    T
    SLAVE
    ADDRESS
    S
    A
    C
    K
    S
    T
    A
    R
    T
    S
    WORD
    ADDRESS n
    A
    C
    K
    SLAVE
    ADDRESS
    DATA n
    A
    C
    K
    S
    T
    O
    P
    P
    相關(guān)PDF資料
    PDF描述
    X24042PI IC AMP CURRENT SENSE SOT-23-6
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