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MC81F4432Q 参数 Datasheet PDF下载

MC81F4432Q图片预览
型号: MC81F4432Q
PDF下载: 下载PDF文件 查看货源
内容描述: ABOV半导体的8位单芯片微控制器产品 [ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS]
分类和应用: 半导体微控制器
文件页数/大小: 198 页 / 4293 K
品牌: FINECHIPS [ FINECHIPS ]
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MC81F4432  
9. MEMORY ORGANIZATION  
This MCU has separated address spaces for the *program memory* and the *data Memory*.  
The program memory is a ROM which stores a program code. It is not possible to write a data at the  
program memory while the MCU is running.  
The Data Memory is a REM which is used by MCU at running time.  
9.1 Registers  
There are few registers which are used for MCU operating.  
A
X
ACCUMULATOR  
X REGISTER  
Y
Y REGISTER  
SP  
PCL  
PSW  
STACK POINTER  
PROGRAM COUNTER  
PROGRAM STATUS WORD  
PCH  
Figure 9-1 Configuration of Registers  
Accumulator( A Register ) : Accumulator is the 8-bit general purpose register, which is used for  
accumulating and some data operations such as transfer, temporary saving, and conditional  
judgment , etc.  
And it can be used as a part of 16-bit register with Y Register as shown below.  
Y
Y
A
A
Two 8-bit Registers can be used as a YA16-bit Register  
Figure 9-2 Configuration of YA 16-bit Registers  
X, Y Registers: In the addressing mode, these are used as a index register. It makes it possible to  
access at Xth or Yth memory from specific address. It is extremely effective for referencing a  
subroutine table and a memory table.  
These registers also have increment, decrement, comparison and data transfer functions, and they  
can be used as a simple accumulator.  
October 19, 2009 Ver.1.35  
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