參數(shù)資料
    型號： HD40A4669
    廠商： Hitachi,Ltd.
    英文描述： Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
    中文描述： 低電壓如同在微機(jī)芯片的DTMF產(chǎn)生電路（帶雙音多頻電路的低電壓微計(jì)算機(jī)）
    文件頁數(shù)： 23/142頁
    文件大小： 894K
    代理商： HD40A4669
    HD404669 Series
    23
    Interrupts
    The MCU has 9 interrupt sources: five external signals (
    INT
    0
    ,
    INT
    1
    , INT
    2
    –INT
    4
    ), three timer/ counters
    (timers A, C, and D), serial interface (Serial 1).
    An interrupt request flag (IF), interrupt mask (IM), and vector address are provided for each interrupt
    source, and an interrupt enable flag (IE) controls the entire interrupt process.
    As vector addresses are shared by interrupt sources timer C and INT
    3
    , and timer D and INT
    4
    , so the type of
    request that has occurred must be checked at the beginning of interrupt processing.
    Interrupt Control Bits and Interrupt Processing:
    Locations $000 to $003 and $022 to $023 in RAM are
    reserved for the interrupt control bits which can be accessed by RAM bit manipulation instructions.
    The interrupt request flag (IF) cannot be set by software. MCU reset initializes the interrupt enable flag
    (IE) and the IF to 0 and the interrupt mask (IM) to 1.
    A block diagram of the interrupt control circuit is shown in figure 9, interrupt priorities and vector
    addresses are listed in table 2, and interrupt processing conditions for the 9 interrupt sources are listed in
    table 3.
    An interrupt request occurs when the IF is set to 1 and the IM is set to 0. If the IE is 1 at that point, the
    interrupt is processed. A priority programmable logic array (PLA) generates the vector address assigned to
    that interrupt source.
    The interrupt processing sequence is shown in figure 10 and an interrupt processing flowchart is shown in
    figure 11. After an interrupt is acknowledged, the previous instruction is completed in the first cycle. The
    IE is reset in the second cycle, the carry, status, and program counter values are pushed onto the stack
    during the second and third cycles, and the program jumps to the vector address to execute the instruction
    in the third cycle.
    Program the JMPL instruction at each vector address, to branch the program to the start address of the
    interrupt program, and reset the IF by a software instruction within the interrupt program.
    Table 2 Vector Addresses and Interrupt Priorities
    Reset/Interrupt
    RESET,
    STOPC
    *
    INT
    0
    INT
    1
    Timer A
    Priority
    Vector Address
    —
    $0000
    1
    $0002
    2
    $0004
    3
    $0006
    INT
    2
    Timer C, INT
    3
    Timer D, INT
    4
    Serial 1
    Note:
    4
    $0008
    5
    $000A
    6
    $000C
    7
    $000E
    *
    The
    STOPC
    interrupt request is valid only in stop mode.
    相關(guān)PDF資料
    PDF描述
    HD404668 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
    HD404669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
    HD407A4669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
    HD404719FS Five timer/counters
    HD404439FS Five timer/counters
    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
    HD40A4669H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
    HD40L4818H 制造商:Renesas Electronics Corporation 功能描述:
    HD40-M 制造商:Tamura Corporation of America 功能描述:
    HD40WS/EHOOD/PLUG 制造商:Lapp 功能描述:HD 40 way side entry assembled plug 制造商:Lapp Group 功能描述:HD 40 way side entry assembled plug
    HD-41494-1 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產(chǎn)品類型:Dummy Receptacles 用于:97 Series Plugs
    發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

    采購需求

    (若只采購一條型號，填寫一行即可)

    發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

    發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

    *型號 *數(shù)量 廠商 批號 封裝
    添加更多采購

    我的聯(lián)系方式

    *
    *
    *