Specifications

ESP-13U Specification V1.0

XVI

（3）、 DC-DC power supply circuit is recommended to reserve the position of the dynamic

response capacitor, and the output ripple can be optimized when the load change is large.

（4）、 Proposed addition of ESD Devices to 5V Power supply Interface.

4、GPIO

(1) At the periphery of the module, some GPIO ports are led out, and a resistance of 10-100

ohms can be connected in series on the IO port for use. This suppresses overshoot and is more

stable on both sides. Help for both EMI and ESD.

(2) For the up-and-down drawing of the special io-port, reference will be made to the use

description of the specification, which will affect the start-up configuration of the module.

(3) The IO port of the module is 3.3 v. If the main control does not match the io-level of the

module, it is necessary to increase the level conversion circuit. (4) If the IO interface is directly

connected to the peripheral interface, or the pins and other terminals, it is recommended to

reserve the ESD device near the terminal at the IO trace.

Level switching circuit