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  • 參數(shù)資料
    型號(hào): ISP1181BDGG
    廠商: NXP SEMICONDUCTORS
    元件分類: 總線控制器
    英文描述: Full-speed Universal Serial Bus peripheral controller
    中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PDSO48
    封裝: 6.10 MM, PLASTIC, MO-153, SOT-362-1, TSSOP-48
    文件頁(yè)數(shù): 28/70頁(yè)
    文件大小: 341K
    代理商: ISP1181BDGG
    Philips Semiconductors
    ISP1181B
    Full-speed USB peripheral controller
    Product data
    Rev. 02 — 07 December 2004
    28 of 70
    9397 750 13958
    Koninklijke Philips Electronics N.V. 2004. All rights reserved.
    12.1.4
    Write/Read Hardware Configuration
    This command is used to access the Hardware Configuration Register, which
    consists of 2 bytes. The first (lower) byte contains the device configuration and
    control values, the second (upper) byte holds the clock control bits and the clock
    division factor. The bit allocation is given in
    Table 20
    . A bus reset will not change any
    of the programmed bit values.
    The Hardware Configuration Register controls the connection to the USB bus, clock
    activity and power supply during ‘suspend’ state, output clock frequency, DMA
    operating mode and pin configurations (polarity, signalling mode).
    Code (Hex): BA/BB —
    write/read Hardware Configuration Register
    Transaction —
    write/read 2 bytes
    Table 20:
    Bit
    Symbol
    Reset
    Access
    Bit
    Symbol
    Reset
    Access
    Hardware Configuration Register: bit allocation
    15
    14
    reserved
    EXTPUL
    0
    0
    R/W
    R/W
    7
    6
    DAKOLY
    DRQPOL
    0
    1
    R/W
    R/W
    13
    12
    11
    10
    9
    8
    NOLAZY
    1
    R/W
    5
    DAKPOL
    0
    R/W
    CLKRUN
    0
    R/W
    4
    EOTPOL
    0
    R/W
    CLKDIV[3:0]
    0
    0
    1
    1
    R/W
    3
    R/W
    2
    R/W
    1
    INTLVL
    0
    R/W
    R/W
    0
    INTPOL
    0
    R/W
    WKUPCS
    0
    R/W
    PWROFF
    0
    R/W
    Table 21:
    Bit
    15
    14
    Hardware Configuration Register: bit description
    Symbol
    Description
    -
    reserved
    EXTPUL
    A logic 1 indicates that an external 1.5 k
    pull-up resistor is
    used on pin D
    +
    and that SoftConnect is not used. Bus reset
    value: unchanged.
    NOLAZY
    A logic 1 disables output on pin CLKOUT of the LazyClock
    frequency (100 kHz
    ±
    50 %) during ‘suspend’ state. A logic 0
    causes pin CLKOUT to switch to LazyClock output after
    approximately 2 ms delay, following the setting of bit GOSUSP
    in the Mode Register. Bus reset value: unchanged.
    CLKRUN
    A logic 1 indicates that the internal clocks are always running,
    even during ‘suspend’ state. A logic 0 switches off the internal
    oscillator and PLL, when they are not needed. During ‘suspend’
    state this bit must be made logic 0 to meet the suspend current
    requirements. The clock is stopped after a delay of
    approximately 2 ms, following the setting of bit GOSUSP in the
    Mode Register. Bus reset value: unchanged.
    CLKDIV[3:0]
    This field specifies the clock division factor N, which controls the
    clock frequency on output CLKOUT. The output frequency in
    MHz is given by
    3 MHz to 48 MHz (N = 0 to 15). with a reset value of 12 MHz
    (N = 3). The hardware design guarantees no glitches during
    frequency change. Bus reset value: unchanged.
    DAKOLY
    A logic 1 selects DACK-only DMA mode. A logic 0 selects 8237
    compatible DMA mode. Bus reset value: unchanged.
    13
    12
    11 to 8
    . The clock frequency range is
    7
    48
    N
    1
    +
    (
    )
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