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SN8A1704A 参数 Datasheet PDF下载

SN8A1704A图片预览
型号: SN8A1704A
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-Bit Micro-Controller]
分类和应用: 微控制器
文件页数/大小: 145 页 / 774 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8P1700  
8-bit micro-controller build-in 12-bit ADC  
In worse-power condition as brown out reset. The reset pin may keep high level but the VDD is low voltage. That  
makes the system reset fail and chip error. To connect a diode from reset pin to VDD is a good solution. The circuit  
can force the capacitor to release electric charge and drop the voltage, and solve the error.  
R
VDD  
DIODE  
20K ohm  
RST  
MCU  
C
0.1uF  
VSS  
VCC  
GND  
Figure 6-4. External Reset Circuit with Diode  
LOW VOLTAGE DETECTOR (LVD) DESCRIPTION  
The LVD is a low voltage detector. It detects VDD level and reset the system as the VDD lower than the desired  
voltage. The detect level is 2.4V. If the VDD lower than 2.4V, the system resets. The LVD function is controlled by code  
option. Users can turn on it for special application like worse power condition. LVD work with external reset function.  
They are OR active.  
VDD  
LVD Detect Level  
LVD  
System Reset  
End of LVD Reset  
Figure 6-5. LVD Timing Diagram  
The LVD can protect system to work well under brownout reset. But it is a high consumptive circuit. In 3V condition, the  
LVD consumes about 100uA. It is a very large consumption for battery system. So the LVD supports AC system well.  
Notice: LVD is selected by code option.  
SONiX TECHNOLOGY CO., LTD  
Page 57  
Revision 1.94  
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