ESP-12K Specification V1.0
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3
、
Power supply
(1) 3.3V voltage is recommended, the peak current is more than 500mA
(2) It is recommended to use LDO for power supply; if using DC-DC, it is recommended
to control the ripple within 30mV.
(3) It is recommended to reserve the position of the dynamic response capacitor in the
DC-DC power supply circuit, which can optimize the output ripple when the load
changes greatly.
(4), 3.3V power interface is recommended to add ESD
devices.
4
、
Use of GPIO port
(1) Some GPIO ports are led out of the periphery of the module. If you need to use a
10-100 ohm resistor in series with the IO port. This can suppress overshoot, and the
level on both sides is more stable. Helps both EMI and ESD.
(2) For the up and down of the special IO port, please refer to the instruction manual of
the specification, which will affect the startup configuration of the module.
(3) The IO port of the module is 3.3V. If the IO level of the main control and the module
does not match, a level conversion circuit needs to be added.
(4) If the IO port is directly connected to the peripheral interface, or the pin header and
other terminals, it is recommended to reserve ESD devices near the terminal of the IO
trace.
