Can Stm32wb55 use a hse clock source other than 32mhz?

[энн]

According to page 118 of stm32wb55ce frequency needs to be exactly 32 mhz with no option of holding any other value at all. However when in stm32cube ide the clock configuration tool lists 4-48 mhz as acceptable input frequency for HSE.

Is the datasheet or stm32cube ide wrong?

[TDK · Accepted solution]

A 32 MHz crystal is required for radio operations. If you don't care about that, you can use some other value. However, there is very little reason to choose this chip unless you're using its radio.

So don't overthink it and just use a 32 MHz HSE.

[энн]

However I'm still curious so I should not use the PLL meaning max frequency for sysclk is 32 MHZ?

[TDK]

Not an expert in this chip, but I don't see any reason not to use the PLL.

The second core will use HSE directly to do its thing, but you can use whatever you want. Did you try it?