Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Toshiba/M369/PN/PDN#0x0
PN Pull-Down Control Register
PN0DN
PN1DN
PN2DN
PN3DN
PN4DN
PN5DN
https://github.com/cmsis-svd/cmsis-svd-data