Part Number:TPS3820-Q1Other Parts Discussed in Thread:TPS3820
此芯片在说明里面有描述这段文字;
The watchdog timer can be disabled by disconnecting the WDI pin from the system. If the WDI pin detects that it is in a high-impedance state the TPS3820/3/4/8-xx-Q1 will generate its own WDI pulse to ensure that RESET
does not assert. If this behavior is not desired place a 1-kΩ resistor from WDI to ground. This resistor will help ensure that the TPS3820/3/4/8-xx-Q1 detects that WDI is not in a high-impedance state.
这里描述,如果芯片WDI引脚检测到高阻抗,则内部产生时钟,防止发生复位事件。
请问,这个逻辑或者功能,主要是考虑到什么因素,有这个功能。
FRANK1:
感谢您对TI产品的关注!关于你的咨询, 内容提到的是,如果WDI引脚检测到其处于高阻抗状态,TPS3820/3/4/8-xx-Q1将生成自己的WDI脉冲以确保重置。