STM32F103RDT6 Crystal

[Mom.1]

Hi,

Iam using STM32F103RDT6 for my project. A 12MHz external crystal is used for the same. In the datasheet it shows REXT is needed.

1.What is the purpose of REXT?

2.Is it required mandatory? Because in my board iam not using the same. So I want to know is this will become an issue in the future.

Warm regards,

Monisha OM

[waclawek.jan · Accepted solution]

It limits the power handled by the crystal.

Read AN2867.

JW