Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Alif Semiconductor/AE302F80C1557LE_CM55_HE_View/CDC/CDC_ACTW_CFG#0x0
Active Width Register
Accumulated height including sync, back porch and active height -1 (in units of horizontal scan line).
Accumulated width including sync, back porch and active width -1 (in units of pixel clock period).
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https://github.com/cmsis-svd/cmsis-svd-data