Table 3. Functionalities Depending On The Operating Power Supply Range - STMicroelectronics STM32L151CB Manual

Functional overview
HSE crystal oscillators are disabled. The voltage regulator is in the low power mode.
The device can be woken up from Stop mode by any of the EXTI line, in 8 µs. The EXTI
line source can be one of the 16 external lines. It can be the PVD output, the
Comparator 1 event or Comparator 2 event (if internal reference voltage is on). It can
also be wakened by the USB wakeup.
Stop mode consumption: refer to
consumptions in Stop
•
Standby mode with RTC
Standby mode is used to achieve the lowest power consumption and real time clock.
The internal voltage regulator is switched off so that the entire V
powered off. The PLL, MSI RC, HSI RC and HSE crystal oscillators are also switched
off. The LSE or LSI is still running. After entering Standby mode, the RAM and register
contents are lost except for registers in the Standby circuitry (wakeup logic, IWDG,
RTC, LSI, LSE Crystal 32K osc, RCC_CSR).
The device exits Standby mode in 60 µs when an external reset (NRST pin), an IWDG
reset, a rising edge on one of the three WKUP pins, RTC alarm (Alarm A or Alarm B),
RTC tamper event, RTC timestamp event or RTC Wakeup event occurs.
•
Standby mode without RTC
Standby mode is used to achieve the lowest power consumption. The internal voltage
regulator is switched off so that the entire V
RC, HSI and LSI RC, HSE and LSE crystal oscillators are also switched off. After
entering Standby mode, the RAM and register contents are lost except for registers in
the Standby circuitry (wakeup logic, IWDG, RTC, LSI, LSE Crystal 32K osc,
RCC_CSR).
The device exits Standby mode in 60 µs when an external reset (NRST pin) or a rising
edge on one of the three WKUP pin occurs.
Standby mode consumption: refer to
Note: The RTC, the IWDG, and the corresponding clock sources are not stopped by entering the
Stop or Standby mode.

Table 3. Functionalities depending on the operating power supply range

Operating power
supply range
V = 1.65 to 1.71 V
DD
V = 1.71 to 1.8 V
DD
V = 1.8 to 2.0 V
DD
14/129
Table 22: Typical and maximum current
mode.
Functionalities depending on the operating power supply range
DAC and ADC
operation
Not functional
(1)
Not functional
Conversion time
(1)
up to 500 Ksps
DocID17659 Rev 10
STM32L151x6/8/B, STM32L152x6/8/B
domain is powered off. The PLL, MSI,
CORE
Table 23.
Dynamic voltage
USB
scaling range
Range 2 or
Not functional
Range 3
Range 1,
Not functional Range 2 or
Range 3
Range 1,
Not functional Range 2 or
Range 3
domain is
CORE
I/O operation
Degraded speed
performance
Degraded speed
performance
Degraded speed
performance