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    參數(shù)資料
    

    


    


    
型號：
M38001M5-XXXSP

    

    
廠商：
Mitsubishi Electric Corporation

    

    
元件分類：
DC/DC變換器

    

    
英文描述：
1 watt dc-dc converters

    

    
中文描述：
1瓦的DC - DC轉(zhuǎn)換器

    

    
文件頁數(shù)：
43/173頁

    

    
文件大?。?/td>
4203K

    

    
代理商：
M38001M5-XXXSP


    

    

    

	
    
    
    

    
    
	
    HARDWARE
    1-29
    3800 GROUP USER’S MANUAL
    Processor Modes
    Single-chip mode, memory expansion mode, and microprocessor
    mode can be selected by changing the contents of the processor
    mode bits CM
    0
     and CM
    1
     (bits 0 and 1 of address 003B
    16
    ). In
    memory expansion mode and microprocessor mode, memory can
    be expanded externally through ports P0 to P3. In these modes,
    ports P0 to P3 lose their I/O port functions and become bus pins.
    Fig. 28  Memory maps in various processor modes
    Fig. 29  Structure of CPU mode register
    Single-Chip Mode
    Select this mode by resetting the microcomputer with CNV
    SS
     con-
    nected to V
    SS
    .
    Memory Expansion Mode
    Select this mode by setting the processor mode bits to “01” in soft-
    ware with CNV
    SS
     connected to V
    SS
    . This mode enables external
    memory expansion while maintaining the validity of the internal
    ROM. Internal ROM will take precedence over external memory if
    addresses conflict.
    Microprocessor Mode
    Select this mode by resetting the microcomputer with CNV
    SS
     con-
    nected to V
    CC
    , or by setting the processor mode bits to “10” in
    software with CNV
    SS
     connected to V
    SS
    . In microprocessor mode,
    the internal ROM is no longer valid and external memory must be
    used.
    FUNCTIONAL DESCRIPTION
    Port Name
    Port P0
    Port P1
    Port P2
    Port P3
    Function
    Outputs low-order byte of address.
    Outputs high-order byte of address.
    Operates as I/O pins for data D
    7
     to D
    0
    (including instruction codes).
    P3
    0
     and P3
    1
     function only as output pins
    (except that the port latch cannot be read).
    P3
    2
     is the ONW input pin.
    P3
    3
     is the RESET
    OUT
     output pin. (Note)
    P3
    4
     is the 
    φ
     output pin.
    P3
    5
     is the SYNC output pin.
    P3
    6
     is the WR output pin, and P3
    7
     is the
    RD output pin.
    Note
    : If CNV
    SS
     is connected to V
    SS
    , the microcomputer goes to
    single-chip mode after a reset, so this pin cannot be used
    as the RESET
    OUT
     output pin.
    Table 8.
    Functions of ports in memory expansion mode and
    microprocessor mode
    0000
    16
    0008
    16
    SFR area
    0040
    16
    Internal RAM 
    reserved area
    0000
    16
    0008
    16
    0040
    16
    Internal RAM 
    reserved area
    YYYY
    16
    Internal ROM
    FFFF
    16  
    FFFF
    16  
    Microprocessor mode
    Memory expansion mode
    The shaded areas are external memory areas.
    : 
    YYYY
    16
     is the start address of internal ROM.
    SFR area
    8
    0440
    16
    8
    0440
    16
    b0
    CPU mode register 
    (CPUM : address 003B
    16
    ) 
    Processor mode bits
    0 0 : Single-chip mode
    0 1 : Memory expansion mode
    1 0 : Microprocessor mode 
    1 1 : Not available
    Stack page selection bit
     0 : 0 page
     1 : 1 page
    b7 
    Not used (return “0” when read)
    b1 b0
    
    
    
    
    
    


    


    

    相關PDF資料
    		

    PDF描述
    		

    
    

    
M38001M7-XXXFS
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M38001M7-XXXHP
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M38001M7-XXXSP
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M38001M7-XXXSS
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M38001S7-XXXFP
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    相關代理商/技術參數(shù)
    		

    參數(shù)描述
    		

    
    

    
M38001M5-XXXSS
 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER

    

    
M38001M6-DXXXSP
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M38001M6-XXXFP
 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER

    

    
M38001M6-XXXFS
 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER

    

    
M38001M6-XXXHP
 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER

    

    
    
    
    
	
    	
    
    
     
     
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