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HT46RU66 参数 Datasheet PDF下载

HT46RU66图片预览
型号: HT46RU66
PDF下载: 下载PDF文件 查看货源
内容描述: A / D型8位微控制器与LCD [A/D Type 8-Bit MCU with LCD]
分类和应用: 微控制器
文件页数/大小: 63 页 / 489 K
品牌: HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
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HT46RU66/HT46CU66  
Application Circuits  
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Note: 1. Crystal/resonator system oscillators  
For crystal oscillators, C1 and C2 are only required for some crystal frequencies to ensure oscillation. For  
resonator applications C1 and C2 are normally required for oscillation to occur. For most applications it is not  
necessary to add R1. However if the LVR function is disabled, and if it is required to stop the oscillator when  
VDD falls below its operating range, it is recommended that R1 is added. The values of C1 and C2 should be  
selected in consultation with the crystal/resonator manufacturer specifications.  
2. Reset circuit  
The reset circuit resistance and capacitance values should be chosen to ensure that VDD is stable and re-  
mains within its operating voltage range before the RES pin reaches a high level. Ensure that the length of  
the wiring connected to the RES pin is kept as short as possible, to avoid noise interference.  
3. For applications where noise may interfere with the reset circuit and for details on the oscillator external com-  
ponents, refer to Application Note HA0075E for more information.  
Rev. 1.20  
46  
October 2, 2007  
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