ST STM32WL55JC Reference Manual page 322

Reset and clock control (RCC)
Bits 31:7 Reserved, must be kept at reset value.
Bit 6 LPTIM3EN: CPU1 Low-power timer 3 clocks enable
Bit 5 LPTIM2EN: CPU1 Low-power timer 2 clocks enable
Bits 4:1 Reserved, must be kept at reset value.
Bit 0 LPUART1EN: CPU1 Low power UART 1 clocks enable
7.4.20 RCC APB2 peripheral clock enable register (RCC_APB2ENR)
Address offset: 0x060
Reset value: 0x0000 0000
Access: word, half-word and byte access
Note: When the peripheral clock is not active, the peripheral registers read or write access from
CPU1 is not supported.
31 30 29
Res. Res. Res.
15 14 13
USART1 SPI1
Res. Res.
EN
rw
Bits 31:19 Reserved, must be kept at reset value.
Bit 18 TIM17EN: CPU1 Timer 17 clock enable
This bit is set and cleared by software.
0: TIM17 clock disabled for CPU1
1: TIM17 clock enabled for CPU1
Bit 17 TIM16EN: CPU1 Timer 16 clock enable
This bit is set and cleared by software.
0: TIM16 clock disabled for CPU1
1: TIM16 clock enabled for CPU1
Bits 16:15 Reserved, must be kept at reset value.
Bit 14 USART1EN: CPU1 USART1 clocks enable
This bit is set and cleared by software.
0: USART1 bus and kernel clocks disabled for CPU1
1: USART1 bus and kernel clocks enabled for CPU1
322/1454
This bit is set and cleared by software.
0: LPTIM3 bus and kernel clocks disabled for CPU1
1: LPTIM3 bus and kernel clocks enabled for CPU1
Set and cleared by software.
0: LPTIM2 bus and kernel clocks disable for CPU1
1: LPTIM2 bus and kernel clocks enable for CPU1
Set and cleared by software.
0: LPUART1 bus and kernel clocks disable for CPU1
1: LPUART1 bus and kernel clocks enable for CPU1
28 27 26 25
Res. Res. Res. Res.
12 11 10 9
TIM1 ADC
Res.
EN EN EN
rw rw rw
24 23 22
Res. Res. Res.
8 7 6
Res. Res. Res.
RM0453 Rev 2
21 20 19 18
TIM17
Res. Res. Res.
EN
rw
5 4 3 2
Res. Res. Res. Res.
RM0453
17 16
TIM16
Res.
EN
rw
1 0
Res. Res.