只可以使用内部下拉佛吗r RESET pin without Ground in DA14580?
Device:
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Hi alsameen,
I am sorry i dont understand what you mean, can you please elaborate your question a bit ?
Thanks MT_dialog
As per DA14580 datasheet, the recommended connection of RESET pin is to GND. However, there is an internal PULLDOWN resistor of 25K. In our board design, The RESET pin was left with just a switch for manual reset. So when the switch is not pressed, there is no external connection to the RESET pin. Is it acceptable to leave the RESET pin this way? Will it pick up external noise resulting in an inadvertent reset? Would the chip go into an unpredictable state if the picked up noise signal does not have sufficient pulse width?
Hi alsameen,
In general we recommend to place the RESET pin to ground if this is not used, if you have a trace that is quite large and connected on the reset pin that can result in a pulse on the reset pin and force the device in reset, placing a strong pulldown would be an idea to avoid anything like that.
Thanks MT_dialog