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    2. 參數(shù)資料
      型號(hào): μPD750068
      廠商: NEC Corp.
      英文描述: 4 Bit Single Chip Microcontrollers(4位單片微控制器)
      中文描述: 4位單片微控制器(4位單片微控制器)
      文件頁數(shù): 17/82頁
      文件大?。?/td> 376K
      代理商: ΜPD750068
      17
      m
      PD750064, 750066, 750068, 750064(A), 750066(A), 750068(A)
      4.2 Setting Method of Stack Bank Select Register (SBS)
      Switching between the Mk I mode and Mk II mode can be done by the stack bank select register (SBS). Figure
      4-1 shows the format.
      The SBS is set by a 4-bit memory manipulation instruction.
      When using the Mk I mode, the SBS must be initialized to 100
      B
      Note
      at the beginning of a program. When using
      the Mk II mode, it must be initialized to 000
      B
      Note
      .
      Note
      Set the desired value in the
      position.
      Figure 4-1. Stack Bank Select Register Format
      SBS3
      SBS2
      SBS1
      SBS0
      3
      2
      1
      0
      Symbol
      SBS
      Address
      F84H
      0
      0
      0
      1
      0
      1
      0
      Memory bank 0
      Memory bank 1
      Other than above setting prohibited
      0 must be set in the bit 2 position.
      Stack area specification
      Mk II mode
      Mk I mode
      Mode switching specification
      Caution
      Since SBS. 3 is set to “1” after a RESET signal is generated, the CPU operates in the Mk I mode.
      When executing an instruction in the Mk II mode, set SBS. 3 to “0” to select the Mk II mode.
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