There is a shortage of chips but no shortage of new products. The pace of manufacturers releasing new products does not seem to be affected at all, and our forum friends have not stopped paying attent
EFR32BG22 is a Bluetooth chip from Silicon Labs that can implement BLE host and slave functions. It contains a cortex-M33 core.
To use EFR32BG22, you need to use its supporting IDE, "simplicity studio
Share a PCB project of STLINK V2_1, which can be directly proofed and producedSupports SWD mode, with virtual serial port, supports USB download,supports automatic firmware upgradeFirmware refer to th
The input is 3.3V TTL high and low level. The Darlington output should be the opposite level of TTL. I checked and it is always in the same state. What's going on?Also, the PMOS at the back end is alw