參數(shù)資料
    

    


    


    
型號(hào)：
M34514M6-263FP

    

    
廠商：
Mitsubishi Electric Corporation

    

    
英文描述：
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

    

    
中文描述：
單芯片4位微機(jī)的CMOS

    

    
文件頁(yè)數(shù)：
17/106頁(yè)

    

    
文件大?。?/td>
1304K

    

    
代理商：
M34514M6-263FP


    

    

    

	
    
    
    

    
    
	
    17
    4513/4514 Group
    SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
    MITSUBISHI MICROCOMPUTERS
    PRELIMINARY
    Notice: This is not a final specification.
    change.
    Some parametric limits are subject to
    (8) Program counter (PC)
    Program counter (PC) is used to specify a ROM address (page and
    address). It determines a sequence in which instructions stored in
    ROM are read. It is a binary counter that increments the number of
    instruction bytes each time an instruction is executed. However,
    the value changes to a specified address when branch instructions,
    subroutine call instructions, return instructions, or the table refer-
    ence instruction (TABP p) is executed.
    Program counter consists of PC
    H
     (most significant bit to bit 7)
    which specifies to a ROM page and PC
    L
     (bits 6 to 0) which speci-
    fies an address within a page. After it reaches the last address
    (address 127) of a page, it specifies address 0 of the next page
    (Figure 7).
    Make sure that the PC
    H
     does not specify after the last page of the
    built-in ROM.
    (9) Data pointer (DP)
    Data pointer (DP) is used to specify a RAM address and consists
    of registers Z, X, and Y. Register Z specifies a RAM file group, reg-
    ister X specifies a file, and register Y specifies a RAM digit (Figure
    8).
    Register Y is also used to specify the port D bit position.
    When using port D, set the port D bit position to register Y certainly
    and execute the SD, RD, or SZD instruction (Figure 9).
    Fig. 7 Program counter (PC) structure
    Fig. 8 Data pointer (DP) structure
    Fig. 9 SD instruction execution example
    Z
    1
     Z
    0
     X
    3
     X
    2
     X
    1
     X
    0
     Y
    3
     Y
    2
     Y
    1
     Y
    0
    Data pointer (DP)
    Register Z (2)
    Register X (4)
    Register Y (4)
    Specifying 
    RAM digit
    Specifying RAM file
    Specifying RAM file group
    0
    Register Y (4)
    1
    0
    1
    1
    D
    7
    Set
    Specifying bit position
    Port D output latch
    D
    5
    D
    6
    D
    4
    D
    0
    p
    5
     p
    4
     p
    3
     p
    2
     p
    1
     p
    0
    a
    6
     a
    5
     a
    4
     a
    3
     a
    2
     a
    1
     a
    0
    Program counter
    PC
    H
    Specifying page
    PC
    L
    Specifying address
    p
    6
    
    
    
    
    
    


    


    

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