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    參數(shù)資料
    型號: ISP1561BM
    廠商: NXP SEMICONDUCTORS
    元件分類: 總線控制器
    英文描述: ISP1561BM
    中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP128
    封裝: 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-420-1, LQFP-128
    文件頁數(shù): 54/102頁
    文件大小: 2875K
    代理商: ISP1561BM
    Philips Semiconductors
    ISP1561
    USB PCI host controller
    Product data
    Rev. 01 — 06 February 2003
    54 of 102
    9397 750 10015
    Koninklijke Philips Electronics N.V. 2003. All rights reserved.
    11.1.16
    HcFmNumber register (address: value read from func0 or func1 of address
    10H
    +
    3CH)
    This register is a 16-bit counter, and the bit allocation is given in
    Table 72
    . It provides
    a timing reference among events happening in the Host Controller and the HCD. The
    HCD may use the 16-bit value specified in this register and generate a 32-bit frame
    number without requiring frequent access to the register.
    Table 71:
    Bit
    31
    HcFmRemaining register: bit description
    Symbol
    Description
    FRT
    FrameRemainingToggle:
    This bit is loaded from the FIT
    (FrameIntervalToggle) field of HcFmInterval whenever FR
    (FrameRemaining) reaches 0. This bit is used by the HCD for the
    synchronization between FI (FrameInterval) and FR.
    -
    reserved
    FR[13:0]
    FrameRemaining:
    This counter is decremented at each bit time.
    When it reaches 0, it is reset by loading the FI value specified in
    HcFmInterval at the next bit time boundary. When entering the
    USBOPERATIONAL state, the Host Controller re-loads the content
    with the FI of HcFmInterval and uses the updated value from the
    next SOF.
    30 to 14
    13 to 0
    Table 72:
    Bit
    Symbol
    Reset
    Access
    Bit
    Symbol
    Reset
    Access
    Bit
    Symbol
    Reset
    Access
    Bit
    Symbol
    Reset
    Access
    HcFmNumber register: bit allocation
    31
    30
    29
    28
    27
    26
    25
    24
    reserved
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    23
    22
    21
    20
    19
    18
    17
    16
    reserved
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    0
    -
    9
    0
    -
    8
    15
    14
    13
    12
    11
    10
    reserved
    FN[13:8]
    0
    -
    7
    0
    -
    6
    0
    0
    0
    0
    0
    0
    R/W
    5
    R/W
    4
    R/W
    3
    R/W
    2
    R/W
    1
    R/W
    0
    FN[7:0]
    0
    0
    0
    0
    0
    0
    0
    0
    R/W
    R/W
    R/W
    R/W
    R/W
    R/W
    R/W
    R/W
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