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  • 參數(shù)資料
    型號(hào): HD404342R
    廠商: Hitachi,Ltd.
    英文描述: 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
    中文描述: 4位HMCS400系列微電腦(4位單片微計(jì)算機(jī))
    文件頁(yè)數(shù): 23/100頁(yè)
    文件大?。?/td> 610K
    代理商: HD404342R
    HD404344R Series/HD404394 Series
    23
    Table 1
    Initial Values After MCU Reset
    Item
    Abbr.
    Initial Value
    Contents
    Program counter
    (PC)
    $0000
    Indicates program execution
    point from start address of ROM
    area
    Status flag
    (ST)
    1
    Enables conditional branching
    Stack pointer
    (SP)
    $3FF
    Stack level 0
    Interrupt
    flags/mask
    Interrupt enable flag
    (IE)
    0
    Inhibits all interrupts
    Interrupt request flag
    (IF)
    0
    Indicates there is no interrupt
    request
    Interrupt mask
    (IM)
    1
    Prevents (masks) interrupt
    requests
    I/O
    Port data register
    (PDR)
    All bits 1
    Enables output at level 1
    Data control register
    (DCD0, DCD1)
    All bits 0
    Turns output buffer off (to high
    impedance)
    (DCR0,- DCR3) All bits 0
    Port mode register A
    (PMRA)
    - 000
    Refer to description of port mode
    register A
    Port mode register B
    (PMRB)
    0 - - 0
    Refer to description of port mode
    register B
    Port mode register C
    (PMRC)
    - - - 0
    Refer to description of port mode
    register C
    Timer/
    counters, serial
    interface
    Timer mode register B1 (TMB1)
    0000
    Refer to description of timer
    mode register B1
    Timer mode register B2 (TMB2)
    - - 00
    Refer to description of timer
    mode register B2
    Timer mode register C
    (TMC)
    0000
    Refer to description of timer
    mode register C
    Serial mode register
    (SMR)
    0000
    Refer to description of serial
    mode register
    Prescaler S
    (PSS)
    $000
    Timer counter B
    (TCB)
    $00
    Timer counter C
    (TCC)
    $00
    Timer write register B
    (TWBU, TWBL) $X0
    Timer write register C
    (TWCU, TWCL) $X0
    Octal counter
    000
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    HD404344R 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
    HD404391S 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
    HD404392S 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
    HD404341R 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
    HD404394S 4-bit HMCS400-series microcomputer(4位單片微計(jì)算機(jī))
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