VOSRDY=B_0x0, BOOSTRDY=B_0x0, USBBOOSTRDY=B_0x0, BOOSTEN=B_0x0, USBPWREN=B_0x0, VOS=B_0x0, USBBOOSTEN=B_0x0
PWR voltage scaling register
| USBBOOSTRDY | USB EPOD booster ready This bit is set to 1 by hardware when the power booster startup time is reached. The USB clock can be provided only after this bit is set. Note: This bit is only available in STM32U59x/5Ax. It is reserved in STM32U575/585. 0 (B_0x0): USB power booster not ready 1 (B_0x1): USB power booster ready |
| BOOSTRDY | EPOD booster ready This bit is set to 1 by hardware when the power booster startup time is reached. The system clock frequency can be switched higher than 50 MHz only after this bit is set. 0 (B_0x0): Power booster not ready 1 (B_0x1): Power booster ready |
| VOSRDY | Ready bit for VCORE voltage scaling output selection 0 (B_0x0): Not ready, voltage level < VOS selected level 1 (B_0x1): Ready, voltage level ≥ VOS selected level |
| VOS | Voltage scaling range selection This field is protected against non-secure access when SYSCLKSEC = 1 in RCC_SECCFGR. It is protected against unprivileged access when SYSCLKSEC = 1 in RCC_SECCFGR and SPRIV = 1 in PWR_PRIVCFGR, or when SYSCLKSEC = 0 and NSPRIV = 1. 0 (B_0x0): Range 4 (lowest power) 1 (B_0x1): Range 3 2 (B_0x2): Range 2 3 (B_0x3): Range 1 (highest frequency). This value cannot be written when VCOREMEN = 1 in TAMP_OR register. |
| BOOSTEN | EPOD booster enable This bit is protected against non-secure access when SYSCLKSEC = 1 in RCC_SECCFGR. It is protected against unprivileged access when SYSCLKSEC = 1 in RCC_SECCFGR and SPRIV = 1 in PWR_PRIVCFGR, or when SYSCLKSEC = 0 and NSPRIV = 1. This bit must be set in range 1 and range 2 before increasing the system clock frequency above 50 MHz. This bit is reset when going into Stop modes (0, 1, 2, 3). 0 (B_0x0): Booster disabled 1 (B_0x1): Booster enabled |
| USBPWREN | USB power enable This bit is protected against non-secure access when SYSCLKSEC = 1 in RCC_SECCFGR. It is protected against unprivileged access when SYSCLKSEC = 1 in RCC_SECCFGR and SPRIV = 1 in PWR_PRIVCFGR, or when SYSCLKSEC = 0 and NSPRIV = 1. Note: This bit is only available in STM32U59x/5Ax. It is reserved in STM32U575/585. 0 (B_0x0): USB power disabled 1 (B_0x1): USB power enabled |
| USBBOOSTEN | USB EPOD booster enable This bit is protected against non-secure access when SYSCLKSEC = 1 in RCC_SECCFGR. It is protected against unprivileged access when SYSCLKSEC = 1 in RCC_SECCFGR and SPRIV = 1 in PWR_PRIVCFGR, or when SYSCLKSEC = 0 and NSPRIV = 1. This bit must be set in range 1 and range 2 before enabling the USB peripheral. This bit is reset when going into Stop modes (0, 1, 2, 3). Note: This bit is only available in STM32U59x/5Ax. It is reserved in STM32U575/585. 0 (B_0x0): USB booster disabled 1 (B_0x1): USB booster enabled |