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PIC12C508A-04/P 参数 Datasheet PDF下载

PIC12C508A-04/P图片预览
型号: PIC12C508A-04/P
PDF下载: 下载PDF文件 查看货源
内容描述: 8引脚, 8位CMOS微控制器 [8-Pin, 8-Bit CMOS Microcontrollers]
分类和应用: 微控制器和处理器外围集成电路光电二极管PC可编程只读存储器时钟
文件页数/大小: 113 页 / 1604 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC12C5XX  
FIGURE 5-2: SUCCESSIVE I/O OPERATION  
Q4  
Q4  
Q4  
Q4  
Q3  
Q3  
Q3  
Q3  
Q1 Q2  
PC  
MOVWF GPIO  
Q1 Q2  
Q1 Q2  
Q1 Q2  
PC + 3  
NOP  
PC + 1  
PC + 2  
NOP  
This example shows a write to GPIO followed  
by a read from GPIO.  
Instruction  
fetched  
MOVF GPIO,W  
Data setup time = (0.25 TCY – TPD)  
where: TCY = instruction cycle.  
TPD = propagation delay  
GP5:GP0  
Port pin  
written here  
Port pin  
sampled here  
Therefore, at higher clock frequencies, a  
write followed by a read may be problematic.  
Instruction  
executed  
MOVWF GPIO  
(Write to  
MOVF GPIO,W  
(Read  
NOP  
GPIO)  
GPIO)  
1999 Microchip Technology Inc.  
DS40139E-page 23  
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