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By btidey
#77151 The hazard with a direct connection, as pointed out, is that with GPIO16 high and an external reset line pulling the reset line low then the chip could get damaged.

The diode guards against this possibility.

In a deployed solution with nothing connected to reset line, and no way of the reset line going low either through an external connection or via an on-board reset button then the hazard does not exist and a direct connection could be safely used.
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By panoss
#77152
btidey wrote:The hazard with a direct connection, as pointed out, is that with GPIO16 high and an external reset line pulling the reset line low then the chip could get damaged.

The diode guards against this possibility.

In a deployed solution with nothing connected to reset line, and no way of the reset line going low either through an external connection or via an on-board reset button then the hazard does not exist and a direct connection could be safely used.

I use no external reset, so it 's safe to use a direct connection, right?
(on RST pin nothing is connected but the GPIO16)

And if I use an external reset, which diode should I use?