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    參數(shù)資料
    型號: PIC16LC62BT
    廠商: Microchip Technology Inc.
    英文描述: 28-Pin 8-Bit CMOS Microcontrollers
    中文描述: 28引腳8位CMOS微控制器
    文件頁數(shù): 18/120頁
    文件大?。?/td> 2125K
    代理商: PIC16LC62BT
    PIC16C62B/72A
    DS35008B-page 18
    Preliminary
    1999 Microchip Technology Inc.
    2.5
    Indirect Addressing, INDF and FSR
    Registers
    The INDF register is not a physical register. Address-
    ing INDF actually addresses the register whose
    address is contained in the FSR register (FSR is a
    pointer).
    Reading INDF itself indirectly (FSR = 0) will produce
    00h. Writing to the INDF register indirectly results in a
    no-operation (although STATUS bits may be affected).
    A simple program to clear RAM locations 20h-2Fh
    using indirect addressing is shown in Example 2-1.
    EXAMPLE 2-1:
    HOW TO CLEAR RAM
    USING INDIRECT
    ADDRESSING
    movlw 0x20 ;initialize pointer
    movwf FSR ; to RAM
    NEXT clrf INDF ;clear INDF register
    incf FSR ;inc pointer
    btfss FSR,4 ;all done
    goto NEXT ;NO, clear next
    CONTINUE
    : ;YES, continue
    An effective 9-bit address is obtained by concatenating
    the 8-bit FSR register and the IRP bit (STATUS<7>), as
    shown in Figure 2-3. However, IRP is not used in the
    PIC16C62B/72A.
    FIGURE 2-3:
    DIRECT/INDIRECT ADDRESSING
    Note 1:
    Maintain clear for upward compatibility with future products.
    2:
    Not implemented.
    Data
    Memory
    Indirect Addressing
    Direct Addressing
    bank select
    location select
    RP1:RP0
    (1)
    6
    0
    from opcode
    IRP
    (1)
    FSR register
    7
    0
    bank select
    location select
    00
    01
    10
    11
    Bank 0
    Bank 1
    Bank 2
    Bank 3
    not used
    (2)
    FFh
    80h
    7Fh
    00h
    17Fh
    100h
    1FFh
    180h
    (2)
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    相關(guān)代理商/技術(shù)參數(shù)
    參數(shù)描述
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