參數(shù)資料
    型號: TSC2301IZQZR
    廠商: TEXAS INSTRUMENTS INC
    元件分類: 消費家電
    英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA120
    封裝: GREEN, PLASTIC, VFBGA-120
    文件頁數(shù): 30/95頁
    文件大?。?/td> 1322K
    代理商: TSC2301IZQZR
    www.ti.com
    Keypad Mask Register (Page 1, Address 10H)
    Secondary Configuration Register (Page 1, Address 06H):
    TSC2301
    SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
    The Keypad Mask register is formatted as follows:
    Bit 15
    Bit 14
    Bit 13
    Bit 12
    Bit 11
    Bit 10
    Bit 9
    Bit 8
    Bit 7
    Bit 6
    Bit 5
    Bit 4
    Bit 3
    Bit 2
    Bit 1
    Bit 0
    MSB
    LSB
    M15
    M14
    M13
    M12
    M11
    M10
    M9
    M8
    M7
    M6
    M5
    M4
    M3
    M2
    M1
    M0
    This is the same format as used in the keypad data register (Page 0, Address 04H). Each bit in these registers
    represents one key on the keypad. In the mask register, if a bit is set (1), then that key is not detected in keypad
    scans. Pressing that key on the keypad also does not cause a KBIRQ, if the bit is set. If the bit is cleared (0), the
    corresponding key is detected when pressed. A 16-key keypad is mapped into the keypad mask (and keypad
    data) register as shown in Table 23. The default value for this register is 0000H, detecting all key presses.
    Table 23. Keypad to Key Bit Mapping
    C1
    C2
    C3
    C4
    R1
    K0
    K1
    K2
    K3
    R2
    K4
    K5
    K6
    K7
    R3
    K8
    K9
    K10
    K11
    R4
    K12
    K13
    K14
    K15
    The result of a keypad scan appears in the keypad data register. Each bit is set in this register, corresponding to
    the key(s) actually pressed. For example, if only key 1 was pressed on a particular scan, the data in the register
    would read as 0x0002; however, if keys 6, 8, and 13 were all pressed simultaneously on that scan, the data
    would read as 0x2140.
    Multiple keys can be pressed simultaneously and are generally decoded correctly by the keypad scan circuitry.
    However, keys that land on three corners of a rectangle can cause a false reading of a key on the fourth corner
    of the rectangle. For example, if keys 0, 3, and 11 were pressed simultaneously, the KEY0, KEY3, and KEY11
    bits are set, but the KEY8 bit is also set. Thus, when considering using multiple-key combinations in an
    application, try to avoid combinations that put three keys on the corners of a rectangle.
    This register allows the user to read the status of the DAV pin through the SPI interface. It controls the behavior
    of the KBIRQ signal, as well as provides control of the audio codec PLL.
    Bit 15
    Bit 14
    Bit 13
    Bit 12
    Bit 11
    Bit 10
    Bit 9
    Bit 8
    Bit 7
    Bit 6
    Bit 5
    Bit 4
    Bit 3
    Bit 2
    Bit 1
    Bit 0
    MSB
    LSB
    SDAV/K
    KBC0
    PLLO
    PCTE
    PDC3
    PDC2
    PDC1
    PDC0
    A3
    A2
    A1
    A0
    N3
    N2
    N1
    N0
    BC1
    36
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