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    參數(shù)資料
    型號: P83C770AAR
    廠商: NXP SEMICONDUCTORS
    元件分類: 微控制器/微處理器
    英文描述: Microcontrollers for PAL/SECAM TV with OSD and VST(帶 OSD和 VST的在PAL/SECAM TV中應用的微控制器)
    中文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP52
    文件頁數(shù): 33/80頁
    文件大小: 266K
    代理商: P83C770AAR
    1999 Jun 11
    33
    Philips Semiconductors
    Product specification
    Microcontrollers for NTSC TVs with On-Screen
    Display (OSD) and Closed Caption (CC)
    P8xCx70 family
    16.1
    AFT Control Register (AFCON)
    Table 40
    AFT Control Register (SFR address EAH)
    Table 41
    Description of AFCON bits
    Table 42
    Selection of AFT channel
    7
    6
    5
    4
    3
    2
    1
    0
    AFTH1
    AFTH0
    AFTL3
    AFTL2
    AFTL1
    AFTL0
    AFTC
    BIT
    SYMBOL
    AFTH1
    AFTH0
    AFTL3
    AFTL2
    AFTL1
    AFTL0
    AFTC
    DESCRIPTION
    7
    6
    5
    4
    3
    2
    1
    0
    Reserved.
    AFT channel selection.
    These two bits are used to select the AFT channel; see
    Table 42.
    AFT reference voltage level selection.
    These four bits are used to select the analog
    output voltage (V
    ref
    ) of the 4-bit DAC. V
    ref
    is calculated as shown in the equation below:
    V
    AFT compare result.
    If AFTC = 0; the AFT input voltage is lower than the reference
    voltage. If AFTC = 1; the AFC input voltage is higher than the reference voltage.
    AFTH1
    AFTH0
    CHANNEL SELECTED
    0
    0
    1
    1
    0
    1
    0
    1
    AFT0
    AFT1
    AFT2
    illegal code
    V
    ref
    -16
    DAC value
    1
    +
    (
    )
    ×
    =
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