參數(shù)資料
      型號: PIC16C56-LPE/P
      廠商: Microchip Technology
      文件頁數(shù): 147/194頁
      文件大?。?/td> 0K
      描述: IC MCU OTP 1KX12 18DIP
      產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
      標(biāo)準(zhǔn)包裝: 25
      系列: PIC® 16C
      核心處理器: PIC
      芯體尺寸: 8-位
      速度: 40kHz
      外圍設(shè)備: POR,WDT
      輸入/輸出數(shù): 12
      程序存儲器容量: 1.5KB(1K x 12)
      程序存儲器類型: OTP
      RAM 容量: 25 x 8
      電壓 - 電源 (Vcc/Vdd): 2.5 V ~ 6 V
      振蕩器型: 外部
      工作溫度: -40°C ~ 125°C
      封裝/外殼: 18-DIP(0.300",7.62mm)
      包裝: 管件
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      PIC18F2450/4450
      DS39760A-page 54
      Advance Information
      2006 Microchip Technology Inc.
      5.1.1
      PROGRAM COUNTER
      The Program Counter (PC) specifies the address of the
      instruction to fetch for execution. The PC is 21 bits wide
      and is contained in three separate 8-bit registers. The
      low byte, known as the PCL register, is both readable
      and writable. The high byte, or PCH register, contains
      the PC<15:8> bits; it is not directly readable or writable.
      Updates to the PCH register are performed through the
      PCLATH register. The upper byte is called PCU. This
      register contains the PC<20:16> bits; it is also not
      directly readable or writable. Updates to the PCU
      register are performed through the PCLATU register.
      The contents of PCLATH and PCLATU are transferred
      to the program counter by any operation that writes
      PCL. Similarly, the upper two bytes of the program
      counter are transferred to PCLATH and PCLATU by an
      operation that reads PCL. This is useful for computed
      offsets to the PC (see Section 5.1.4.1 “Computed
      The PC addresses bytes in the program memory. To
      prevent the PC from becoming misaligned with word
      instructions, the Least Significant bit of PCL is fixed to
      a value of ‘0’. The PC increments by 2 to address
      sequential instructions in the program memory.
      The
      CALL
      ,
      RCALL
      and
      GOTO
      program
      branch
      instructions write to the program counter directly. For
      these instructions, the contents of PCLATH and
      PCLATU are not transferred to the program counter.
      5.1.2
      RETURN ADDRESS STACK
      The return address stack allows any combination of up
      to 31 program calls and interrupts to occur. The PC is
      pushed onto the stack when a CALL or RCALL
      instruction is executed or an interrupt is Acknowledged.
      The PC value is pulled off the stack on a RETURN,
      RETLW
      or a RETFIE instruction. PCLATU and PCLATH
      are not affected by any of the RETURN or CALL
      instructions.
      The stack operates as a 31-word by 21-bit RAM and a
      5-bit Stack Pointer, STKPTR. The stack space is not
      part of either program or data space. The Stack Pointer
      is readable and writable and the address on the top of
      the stack is readable and writable through the Top-of-
      Stack Special Function Registers. Data can also be
      pushed to, or popped from the stack, using these
      registers.
      A CALL type instruction causes a push onto the stack.
      The Stack Pointer is first incremented and the location
      pointed to by the Stack Pointer is written with the
      contents of the PC (already pointing to the instruction
      following the CALL). A RETURN type instruction causes
      a pop from the stack. The contents of the location
      pointed to by the STKPTR are transferred to the PC
      and then the Stack Pointer is decremented.
      The Stack Pointer is initialized to ‘00000’ after all
      Resets. There is no RAM associated with the location
      corresponding to a Stack Pointer value of ‘00000’; this
      is only a Reset value. Status bits indicate if the stack is
      full, has overflowed or has underflowed.
      5.1.2.1
      Top-of-Stack Access
      Only the top of the return address stack (TOS) is
      readable and writable. A set of three registers,
      TOSU:TOSH:TOSL, hold the contents of the stack loca-
      tion pointed to by the STKPTR register (Figure 5-2). This
      allows users to implement a software stack if necessary.
      After a CALL, RCALL or interrupt, the software can read
      the pushed value by reading the TOSU:TOSH:TOSL
      registers. These values can be placed on a user-defined
      software stack. At return time, the software can return
      these values to TOSU:TOSH:TOSL and do a return.
      The user must disable the global interrupt enable bits
      while accessing the stack to prevent inadvertent stack
      corruption.
      FIGURE 5-2:
      RETURN ADDRESS STACK AND ASSOCIATED REGISTERS
      00011
      001A34h
      11111
      11110
      11101
      00010
      00001
      00000
      00010
      Return Address Stack<20:0>
      Top-of-Stack
      000D58h
      TOSL
      TOSH
      TOSU
      34h
      1Ah
      00h
      STKPTR<4:0>
      Top-of-Stack Registers
      Stack Pointer
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      PIC16C56-LPI/P 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O LPC Ind Temp PDIP18 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
      PIC16C56-LPI/SO 功能描述:8位微控制器 -MCU 1.5KB 25 RAM 12 I/O LPC Ind Temp SOIC18 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 最大時鐘頻率:50 MHz 程序存儲器大小: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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      PIC16C56-RC/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU OTP 16C56 DIP18