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    參數(shù)資料
    

    


    


    
型號(hào)：
COP8SGG628D7

    

    
廠商：
National Semiconductor Corporation

    

    
英文描述：
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
中文描述：
8位的CMOS基于ROM和OTP微控制器具有8K到32K的內(nèi)存，2個(gè)比較器和USART

    

    
文件頁數(shù)：
48/62頁

    

    
文件大?。?/td>
913K

    

    
代理商：
COP8SGG628D7


    

    

    

	
    
    
    

    
    
	
    14.0 Instruction Set
    (Continued)
    Example: Load Accumulator Immediate
    LD A,
    #
    05
    Reg/Data
    Memory
    Accumulator
    Contents
    Before
    XX Hex
    Contents
    After
    05 Hex
    Immediate Short.
     This is a special case of an immediate
    instruction. In the “Load B immediate” instruction, the 4-bit
    immediate value in the instruction is loaded into the lower
    nibble of the B register. The upper nibble of the B register is
    reset to 0000 binary.
    Example: Load B Register Immediate Short
    LD B,
    #
    7
    Reg/Data
    Memory
    B Pointer
    Contents
    Before
    12 Hex
    Contents
    After
    07 Hex
    Indirect from Program Memory.
     This is a special case of
    an indirect instruction that allows access to data tables
    stored in program memory. In the “Load Accumulator Indi-
    rect” (LAID) instruction, the upper and lower bytes of the
    Program Counter (PCU and PCL) are used temporarily as a
    pointer to program memory. For purposes of accessing pro-
    gram memory, the contents of the Accumulator and PCL are
    exchanged. The data pointed to by the Program Counter is
    loaded into theAccumulator, and simultaneously, the original
    contents of PCL are restored so that the program can re-
    sume normal execution.
    Example: Load Accumulator Indirect
    LAID
    Reg/Data
    Memory
    PCU
    PCL
    Accumulator
    Memory Location
    041F Hex
    Contents
    Before
    04 Hex
    35 Hex
    1F Hex
    25 Hex
    Contents
    After
    04 Hex
    36 Hex
    25 Hex
    25 Hex
    14.3.2 Tranfer-of-Control Addressing Modes
    Program instructions are usually executed in sequential or-
    der. However, Jump instructions can be used to change the
    normal execution sequence. Several transfer-of-control ad-
    dressing modes are available to specify jump addresses.
    A change in program flow requires a non-incremental
    change in the Program Counter contents. The Program
    Counter consists of two bytes, designated the upper byte
    (PCU) and lower byte (PCL). The most significant bit of PCU
    is not used, leaving 15 bits to address the program memory.
    Different addressing modes are used to specify the new
    address for the Program Counter. The choice of addressing
    mode depends primarily on the distance of the jump. Farther
    jumps sometimes require more instruction bytes in order to
    completely specify the new Program Counter contents.
    The available transfer-of-control addressing modes are:
    Jump Relative
    Jump Absolute
    Jump Absolute Long
    The transfer-of-control addressing modes are described be-
    low. Each description includes an example of a Jump in-
    struction using a particular addressing mode, and the effect
    on the Program Counter bytes of executing that instruction.
    Jump Relative.
     In this 1-byte instruction, six bits of the
    instruction opcode specify the distance of the jump from the
    current program memory location. The distance of the jump
    can range from 31 to +32.AJP+1 instruction is not allowed.
    The programmer should use a NOP instead.
    Example: Jump Relative
    JP 0A
    Jump Indirect
    Reg
    Contents
    Before
    02 Hex
    05 Hex
    Contents
    After
    02 Hex
    0F Hex
    PCU
    PCL
    Jump Absolute.
     In this 2-byte instruction, 12 bits of the
    instruction opcode specify the new contents of the Program
    Counter. The upper three bits of the Program Counter re-
    main unchanged, restricting the new Program Counter ad-
    dress to the same 4 kbyte address space as the current
    instruction.
    (This restriction is relevant only in devices using more than
    one 4 kbyte program memory space.)
    Example: Jump Absolute
    JMP 0125
    Reg
    Contents
    Before
    0C Hex
    77 Hex
    Contents
    After
    01 Hex
    25 Hex
    PCU
    PCL
    Jump Absolute Long.
     In this 3-byte instruction, 15 bits of
    the instruction opcode specify the new contents of the Pro-
    gram Counter.
    Example: Jump Absolute Long
    JMP 03625
    Reg/
    Memory
    PCU
    PCL
    Contents
    Before
    42 Hex
    36 Hex
    Contents
    After
    36 Hex
    25 Hex
    Jump Indirect.
     In this 1-byte instruction, the lower byte of
    the jump address is obtained from a table stored in program
    memory, with the Accumulator serving as the low order byte
    of a pointer into program memory. For purposes of access-
    ing program memory, the contents of the Accumulator are
    written to PCL (temporarily). The data pointed to by the
    Program Counter (PCH/PCL) is loaded into PCL, while PCH
    remains unchanged.
    Example: Jump Indirect
    JID
    Reg/
    Memory
    PCU
    PCL
    Accumulator
    Memory
    Contents
    Before
    01 Hex
    C4 Hex
    26 Hex
    Contents
    After
    01 Hex
    32 Hex
    26 Hex
    C
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    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
COP8SGG628D8
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG628D9
Aluminum Electrolytic Radial Lead Audio Grade Capacitor; Capacitance: 2200uF; Voltage: 25V; Case Size: 12.5x25 mm; Packaging: Bulk

    

    
COP8SGG728N9
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG728Q6
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG728Q7
Aluminum Electrolytic Radial Lead Audio Grade Capacitor; Capacitance: 1000uF; Voltage: 35V; Case Size: 12.5x20 mm; Packaging: Bulk

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
COP8SGR728M7
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M7/NOPB
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M8
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M8/NOPB
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728N8
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
    
    
    
	
    	
    
    
     
     
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