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    參數(shù)資料
    

    


    


    
型號(hào)：
TS87C51RD2-MIL

    

    
廠商：
Atmel

    

    
文件頁(yè)數(shù)：
61/84頁(yè)

    

    
文件大小：
0K

    

    
描述：
IC MCU 8051 OTP 64K 5V 68PLCC

    

    
標(biāo)準(zhǔn)包裝：
19

    

    
系列：
87C

    

    
核心處理器：
8051
    		

    

    
芯體尺寸：
8-位
    		

    

    
速度：
40/20MHz
    		

    

    
連通性：
UART/USART
    		

    

    
外圍設(shè)備：
POR，PWM，WDT
    		

    

    
輸入/輸出數(shù)：
48
    		

    

    
程序存儲(chǔ)器容量：
64KB（64K x 8）
    		

    

    
程序存儲(chǔ)器類(lèi)型：
OTP
    		

    

    
RAM 容量：
1K x 8
    		

    

    
電壓 - 電源 (Vcc/Vdd)：
4.5 V ~ 5.5 V
    		

    

    
振蕩器型：
內(nèi)部
    		

    

    
工作溫度：
-40°C ~ 85°C
    		

    

    
封裝/外殼：
68-PLCC
    		

    

    
包裝：
管件
    		

    

    

    

	
    
    
    

    
    
	
    dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
    DS70292G-page 66
     2007-2012 Microchip Technology Inc.
    4.8
    Interfacing Program and Data
    Memory Spaces
    The dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/
    X04, and dsPIC33FJ128GPX02/X04 architecture uses
    a 24 bit wide program space and a 16 bit wide data
    space. The architecture is also a modified Harvard
    scheme, meaning that data can also be present in the
    program space. To use this data successfully, it must
    be accessed in a way that preserves the alignment of
    information in both spaces.
    Aside
    from
    normal
    execution,
    the
    dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04,
    and dsPIC33FJ128GPX02/X04 architecture provides
    two methods by which program space can be
    accessed during operation:
     Using table instructions to access individual bytes
    or words anywhere in the program space
     Remapping a portion of the program space into
    the data space (Program Space Visibility)
    Table instructions allow an application to read or write
    to small areas of the program memory. This capability
    makes the method ideal for accessing data tables that
    need to be updated periodically. It also allows access
    to all bytes of the program word. The remapping
    method allows an application to access a large block of
    data on a read-only basis, which is ideal for look-ups
    from a large table of static data. The application can
    only access the least significant word of the program
    word.
    4.8.1
    ADDRESSING PROGRAM SPACE
    Since the address ranges for the data and program
    spaces are 16 and 24 bits, respectively, a method is
    needed to create a 23-bit or 24-bit program address
    from 16-bit data registers. The solution depends on the
    interface method to be used.
    For table operations, the 8-bit Table Page register
    (TBLPAG) is used to define a 32K word region within
    the program space. This is concatenated with a 16-bit
    EA to arrive at a full 24-bit program space address. In
    this format, the Most Significant bit of TBLPAG is used
    to determine if the operation occurs in the user memory
    (TBLPAG<7> = 0) or the configuration memory
    (TBLPAG<7> = 1).
    For remapping operations, the 8-bit Program Space
    Visibility register (PSVPAG) is used to define a
    16K word page in the program space. When the Most
    Significant bit of the EA is ‘1’, PSVPAG is concatenated
    with the lower 15 bits of the EA to form a 23-bit program
    space address. Unlike table operations, this limits
    remapping operations strictly to the user memory area.
    Table 4-39 and Figure 4-9 show how the program EA is
    created for table operations and remapping accesses
    from the data EA. Here, P<23:0> refers to a program
    space word, and D<15:0> refers to a data space word.
    TABLE 4-39:
    PROGRAM SPACE ADDRESS CONSTRUCTION
    Access Type
    Access
    Space
    Program Space Address
    <23>
    <22:16>
    <15>
    <14:1>
    <0>
    Instruction Access
    (Code Execution)
    User
    0
    PC<22:1>
    0
    0xx
    xxxx
    xxxx xxx0
    TBLRD/TBLWT
    (Byte/Word Read/Write)
    User
    TBLPAG<7:0>
    Data EA<15:0>
    0xxx xxxx
    xxxx xxxx xxxx xxxx
    Configuration
    TBLPAG<7:0>
    Data EA<15:0>
    1xxx xxxx
    xxxx xxxx xxxx xxxx
    Program Space Visibility
    (Block Remap/Read)
    User
    0
    PSVPAG<7:0>
    Data EA<14:0>(1)
    0
    xxxx xxxx
    xxx xxxx xxxx xxxx
    Note 1: Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of
    the address is PSVPAG<0>.
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
TS87C51RD2-MILB
 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller

    

    
TS87C51RD2-MILD
 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller

    

    
TS87C51RD2-MILR
 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller

    

    
TS87C51RD2-MIM
 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:High Performance 8-bit Microcontroller

    

    
TS87C51RD2-MIMB
 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:8-Bit Microcontroller

    

    
    
    
    
	
    	
    
    
     
     
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