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D17133CS bảng dữ liệu(PDF) 87 Page - NEC

tên linh kiện D17133CS
Giải thích chi tiết về linh kiện  4-BIT SINGLE-CHIP MICROCONTROLLER
PDF  289 Pages
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nhà sản xuất  NEC [NEC]
Trang chủ  http://www.nec.com/
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D17133CS bảng dữ liệu(HTML) 87 Page - NEC

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CHAPTER 9
REGISTER FILE (RF)
72
Figure 9-2. Relationship Between the Register File and Data Memory
0
1
2
3
4
5
6
7
Data memory
0
Column address
123456789 A B C D E F
BANK0
System register
Control register
Port register
0
1
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.
• Stack
• INT pin
• Power-on/power-down reset
• Comparator
• Timer
• General ports
• Serial interface
• Interrupts



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