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PIC18F4431-I/P 参数 Datasheet PDF下载

PIC18F4431-I/P图片预览
型号: PIC18F4431-I/P
PDF下载: 下载PDF文件 查看货源
内容描述: 28 /40/ 44引脚增强型闪存微控制器采用纳瓦技术,高性能PWM和A / D [28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D]
分类和应用: 闪存微控制器
文件页数/大小: 392 页 / 3127 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC18F2331/2431/4331/4431  
The PLUSW register can be used to implement a form  
On the other hand, using the virtual registers to write to  
an FSR pair may not occur as planned. In these cases,  
the value will be written to the FSR pair but without any  
incrementing or decrementing. Thus, writing to INDF2  
or POSTDEC2 will write the same value to the  
FSR2H:FSR2L.  
of Indexed Addressing in the data memory space. By  
manipulating the value in the W register, users can  
reach addresses that are fixed offsets from pointer  
addresses. In some applications, this can be used to  
implement some powerful program control structure,  
such as software stacks, inside of data memory.  
Since the FSRs are physical registers mapped in the  
SFR space, they can be manipulated through all direct  
operations. Users should proceed cautiously when  
working on these registers, particularly if their code  
uses Indirect Addressing.  
6.7.3.3  
Operations by FSRs on FSRs  
Indirect Addressing operations that target other FSRs or  
virtual registers represent special cases. For example,  
using an FSR to point to one of the virtual registers will  
not result in successful operations. As a specific case,  
assume that FSR0H:FSR0L contain FE7h, the address  
of INDF1. Attempts to read the value of the INDF1 using  
INDF0 as an operand will return 00h. Attempts to write  
to INDF1 using INDF0 as the operand will result in a NOP.  
Similarly, operations by Indirect Addressing are gener-  
ally permitted on all other SFRs. Users should exercise  
the appropriate caution that they do not inadvertently  
change settings that might affect the operation of the  
device.  
2010 Microchip Technology Inc.  
DS39616D-page 77