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D17133CS Datasheet

  • D17133CS

  • 4-BIT SINGLE-CHIP MICROCONTROLLER

  • 1138.87KB

  • 289頁(yè)

  • NEC   NEC

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CHAPTER 9
REGISTER FILE (RF)
Figure 9-2. Relationship Between the Register File and Data Memory
Column address
0 1 2 3 4 5 6 7 8 9 A B C D E F
0
1
Row address
2
3
4
5
6
7
Port register
System register
BANK0
Data memory
0
1
Control register
2
3
Register file
9.2 FUNCTIONS OF THE REGISTER FILE
9.2.1 Functions of the Register File
The register file is mainly used as a control register (a register called the control register is allocated in the register
file) for specifying conditions for peripheral hardware.
This control register is allocated within the register file at address location 00H to 3FH.
The rest of the register file (40H to 7FH) overlaps with data memory. As shown in
9.2.3,
because of this overlap,
this area of the register file is the same as normal memory with one exception: The register file manipulation
instructions PEEK and POKE can be used with this area of memory but not with normal data memory.
9.2.2 Control Register Functions
The peripheral hardware whose conditions can be controlled by control registers is listed below.
For details concerning peripheral hardware and the control register, refer to the section for the peripheral hardware
concerned.
鈥?Stack
鈥?Power-on/power-down reset
鈥?Timer
鈥?Serial interface
鈥?INT pin
鈥?Comparator
鈥?General ports
鈥?Interrupts
72

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