Table of Contents
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RM0461
Table 37. Functionalities depending on system operating mode
Peripheral
VREFBUF
COMPx (x = 1, 2)
Temperature sensor
Timers (TIMx) x = 1, 2, 16, 17)
LPTIM1
LPTIMx (x = 2, 3)
Independent watchdog
(IWDG)
Window watchdog (WWDG)
SysTick timer
True random number
generator (RNG)
AES hardware accelerator
PKA hardware accelerator
CRC calculation unit
HSEM
EXTI
GPIOs
1. Legend: Y = Yes (enable). O = Optional (disable by default and can be enabled by software). R = data retained.
- = Not available. Gray cells indicate wakeup capability.
2. The SRAM clock can be gated on or off.
3. Flash memory can be placed in power-down mode.
4. The SRAM2 content can optionally be retained when the PWR_CR3.RRS bit is set.
5. Only when the sub-GHz radio is active.
6. Some peripherals with wakeup from Stop capability can request HSI16 to be enabled. In this case, HSI16 is woken up by
the peripheral, and only feeds the peripheral that requested it. HSI16 is automatically put off when the peripheral does not
need it anymore.
7. HSE32 can be used by sub-GHz radio system.
8. UART reception is functional in Stop 0 and 1 modes. LPUART1 reception is functional is Stop 0, 1, and 2 modes. LPUART1
generates a wakeup interrupt on Start address match or received frame event.
9. I2Cx (x= 1, 2) address detection is functional in Stop 0 and 1 modes. I2C3 address detection is functional in Stop 0, 1, and
2 modes. I2C3 generates a wakeup interrupt in case of address match.
10. Voltage scaling range 1 only.
Stop 0
-
O
O
O
O
O
O
O
O
O
O
O
O
O
O
R
O
O
O
O
R
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
R
O
O
O
O
R
(1
O
O
R
R
R
(10)
0)
O
O
O
O
R
O
O
O
O
R
O
O
O
O
R
O
R
O
R
R
O
O
O
O
R
O
O
O
O
O
RM0461 Rev 5
Stop 1
Stop 2
-
-
-
O
-
R
-
O
O
O
O
O
-
R
-
-
-
-
R
-
-
-
O
O
O
O
O
O
O
O
-
-
O
O
O
O
O
-
R
-
R
-
-
R
-
R
-
-
R
-
-
-
-
R
-
-
-
-
R
-
-
-
-
R
-
R
-
-
R
-
-
-
O
R
O
R
O
O
O
O
O
O
Power control (PWR)
(1)
(continued)
Standby
Shutdo
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
O
O
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3
3
pin
pin
(11)
(13)
R
(1
s
s
(12)
2)
197/1306
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
229
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