KW45 external RC RESET circuit

[Lingyinglu]

Hi guys

     I design wireless key base on BLE KW45 chip,I have some questions,please support,TKS.

1.for the Reset pin23,Whether external RC RESET circuit is required?if need the RC,how long is the reset time?

2.for the Program pins SWD-CLK&SWD_DIO,Whether the external pull up or pull down is required？

[Gavin_Jia]

Hi @Lingyinglu ,

Hope you are doing well!

1. An external RC reset circuit is not required. But if you added it, a common RC reset time is 10-20 ms. Should not be less than 2 μs.

2. External pullup resistors are recommended for the SWD pins to prevent them from floating.

Best regards,

Gavin