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    參數(shù)資料
    型號: AS91L1002U40L100CG
    廠商: Electronic Theatre Controls, Inc.
    英文描述: The AS91L1006BU is a one to 6-port JTAG gateway
    中文描述: 該AS91L1006BU是一個6口的JTAG網(wǎng)關(guān)
    文件頁數(shù): 7/28頁
    文件大小: 415K
    代理商: AS91L1002U40L100CG
    July 2004
    AS91L1006BU
    SELF_TEST Register
    The AS91L1006BU device supports a
    single output pin that can be controlled via the
    IEEE1149.1 interface. When the instruction is
    loaded into the AS91L1006BU instruction register,
    a single bit data register is connected which is
    always reset to logic zero when the TAP state
    machine enters Capture-DR. This will cause the
    SELF_TEST pin to pulse low for one cycle of TCK,
    during the Update-DR phase. This low going pulse
    can be used to initiate self-tests on PCB’s in a rack
    via the JTAG interface.
    LSP_ASYNC_RST Register
    The AS91L1006BU device supports async
    reset tests on the devices connected to the LSPs.
    The standard method of performing these tests by
    utilizing the primary TRST pin cannot be used as it
    will cause the AS91L1006BU to deselect and its
    internal registers to be reset. In order to enable
    async reset tests on LSPs, the test tool should
    instruct the device to toggle the LSP reset pins
    while maintaining the set up information in the
    AS91L1006BU. When the instruction is loaded
    into the AS91L1006BU instruction register, a
    single bit data register is connected as the data
    register which is always reset to logic zero when
    the TAP state machine enters Capture-DR. This
    will cause the LSP TRST pins to pulse low for one
    TCK cycle, during the Update-DR phase.
    AUTOWR Register
    This is a 6-bit register that controls the pass-
    through of the JTAG Technologies AutoWR
    signal to any LSP. The register is reset to all
    zeros when entering the Test-Logic-Reset state.
    Note: The MCGR is reset to 00 upon receiving TRST or the entering of the
    Test-Logic-Reset state
    AutoWr
    Register
    (Bit 2 –
    Bit 0)
    000
    LSP 3
    AutoWr
    Signal
    LSP 2
    AutoWr
    Signal
    LSP 1
    AutoWr
    Signal
    High Z
    High Z
    High Z
    001
    High Z
    High Z
    Active
    011
    High Z
    Active
    Active
    100
    Active
    High Z
    High Z
    101
    Active
    High Z
    Active
    110
    Active
    Active
    High Z
    111
    Active
    Active
    Active
    AutoWr
    Register
    (Bit 5 – Bit
    3)
    000
    LSP 6
    AutoWr
    Signal
    LSP 5
    AutoWr
    Signal
    LSP 4
    AutoWr
    Signal
    High Z
    High Z
    High Z
    001
    High Z
    High Z
    Active
    011
    High Z
    Active
    Active
    100
    Active
    High Z
    High Z
    101
    Active
    High Z
    Active
    110
    Active
    Active
    High Z
    111
    Active
    Active
    Active
    Table 6 - AUTOWR Register Mapping
    www.alsc.com
    Alliance Semiconductor
    7
    2003, 2004 Copyright Alliance Semconductor Corporation. All Rights reserved.
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