Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Alif Semiconductor/AE512F80F5582AS_CM55_HE_View/VBAT/RTC_CLK_EN#0x0
CLK_EN=Val_0x0
LPRTC Clock Enable Register
Enable SYST_PCLK and S32K_CLK for LPRTC. This bit must be set before any programming to LPRTC.
0 (Val_0x0): Disable LPRTC clocks
1 (Val_0x1): Enable LPRTC clocks
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https://github.com/cmsis-svd/cmsis-svd-data