Specifications

Table Of Contents

Ra-01HH 规格书 V1.0

第 12 页共 15 页

pad and the round-hole pad.

（2）、In order to meet the performance of the on-board antenna, metal parts are

prohibited from being placed around the antenna.

3、Power Supply

（1）、Recommended voltage 3.3 V, Peak:Current over 200mA .

（2）、It is recommended to use the LDO power supply；If DC-DC is used, the ripple

is controlled within 30 mV.

（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、GPIO

（1）.There’s a few GPIO port design outside the module，if require to use

recommand the IO port to tadem the resistance for 10 to 100 ohmic.This can suppress overshoot，It's

even more stable on both sides.It would help both EMI and ESD.

（2）.Special IO’s pull up and down，should refer to the direction of use

in Specification, here will affect the startup configuration of the module.

（3）.IO port of module is 3.3V,if master control and the IO level of module

doesn’t match,required to add Level swithing circuit.

（4）.If IO port connected to out-ring interface directly，pin or other etc，recommended to reserved ESD

device near the terminal of IO circuit line .