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  • 參數(shù)資料
    型號: PIC12C672-04/P
    廠商: Microchip Technology
    文件頁數(shù): 59/129頁
    文件大?。?/td> 0K
    描述: IC MCU OTP 2KX14 A/D 8DIP
    產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
    8-bit PIC® Microcontroller Portfolio
    標(biāo)準(zhǔn)包裝: 60
    系列: PIC® 12C
    核心處理器: PIC
    芯體尺寸: 8-位
    速度: 4MHz
    外圍設(shè)備: POR,WDT
    輸入/輸出數(shù): 5
    程序存儲器容量: 3.5KB(2K x 14)
    程序存儲器類型: OTP
    RAM 容量: 128 x 8
    電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
    數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b
    振蕩器型: 內(nèi)部
    工作溫度: 0°C ~ 70°C
    封裝/外殼: 8-DIP(0.300",7.62mm)
    包裝: 管件
    配用: ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
    AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
    1999 Microchip Technology Inc.
    DS30561B-page 35
    PIC12C67X
    FIGURE 6-3:
    DATA TRANSFER SEQUENCE ON THE SERIAL BUS
    FIGURE 6-4:
    ACKNOWLEDGE TIMING
    6.2
    Device Addressing
    After generating a START condition, the processor
    transmits a control byte consisting of a EEPROM
    address and a Read/Write bit that indicates what type
    of operation is to be performed. The EEPROM address
    consists of a 4-bit device code (1010) followed by three
    don’t care bits.
    The last bit of the control byte determines the operation
    to be performed. When set to a one, a read operation
    is selected, and when set to a zero, a write operation is
    selected (Figure 6-5). The bus is monitored for its cor-
    responding EEPROM address all the time. It generates
    an acknowledge bit if the EEPROM address was true
    and it is not in a programming mode.
    FIGURE 6-5:
    CONTROL BYTE FORMAT
    (A)
    (B)
    (C)
    (D)
    (A)
    (C)
    SCL
    SDA
    START
    CONDITION
    ADDRESS OR
    ACKNOWLEDGE
    VALID
    DATA
    ALLOWED
    TO CHANGE
    STOP
    CONDITION
    SCL
    9
    8
    7
    6
    5
    4
    3
    2
    1
    123
    Transmitter must release the SDA line at this point
    allowing the Receiver to pull the SDA line low to
    acknowledge the previous eight bits of data.
    Receiver must release the SDA line at this
    point so the Transmitter can continue
    sending data.
    Data from transmitter
    SDA
    Acknowledge
    Bit
    10
    1
    0
    X
    SACK
    R/W
    Device Select
    Bits
    Don’t Care
    Bits
    EEPROM Address
    Acknowledge Condition
    Start Condition
    Read/Write Bit
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