1. open https://www.nxp.com/
2. signed in your NXP account
3. click "My NXP Account" -> click "Profile" -> click "Secure Resources" -> click "Asset" -> type in "hse reference" in Asset Name -> click "SEARCH"
If you have the secure access rights, you will see the HSE Reference Manual.
If you don't have the secure access rights, try this solution: https://community.nxp.com/t5/S32G/access-to-S32G-HSE-firmware-doc/m-p/1308900/highlight/true#
