STM32L4A6XG datasheet(34/282 Pages) STMICROELECTRONICS

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Functional overview

STM32L4A6xG

34/282

DS11584 Rev 8

3.10.5

Reset mode

In order to improve the consumption under reset, the I/Os state under and after reset is

“analog state” (the I/O schmitt trigger is disable). In addition, the internal reset pull-up is

deactivated when the reset source is internal.

3.10.6

VBAT operation

The VBAT pin allows to power the device VBAT domain from an external battery, an external

supercapacitor, or from VDD when no external battery and an external supercapacitor are

SysTick timer

Touch sensing

controller (TSC)

OOO

Random number

generator (RNG)

O(8)

AES hardware

accelerator

OOO

HASH hardware

accelerator

OOO

CRC calculation unit

GPIOs

OOO

(9)

pins

(10)

(11)

pins

(10)

1. Legend: Y = Yes (Enable). O = Optional (Disable by default. Can be enabled by software). - = Not available.

2. The Flash can be configured in power-down mode. By default, it is not in power-down mode.

3. The SRAM clock can be gated on or off.

4. SRAM2 content is preserved when the bit RRS is set in PWR_CR3 register.

5. 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 which requested it. HSI16 is automatically put off when the peripheral does not

need it anymore.

6. UART and LPUART reception is functional in Stop mode, and generates a wakeup interrupt on Start, address match or

received frame event.

7. I2C address detection is functional in Stop mode, and generates a wakeup interrupt in case of address match.

8. Voltage scaling Range 1 only.

9. I/Os can be configured with internal pull-up, pull-down or floating in Standby mode.

10. The I/Os with wakeup from Standby/Shutdown capability are: PA0, PC13, PE6, PA2, PC5.

11. I/Os can be configured with internal pull-up, pull-down or floating in Shutdown mode but the configuration is lost when

exiting the Shutdown mode.

Table 5. Functionalities depending on the working mode(1) (continued)

Peripheral

Run

Sleep

Low-

power

run

Low-

power

sleep

Stop 0/1

Stop 2

Standby Shutdown

VBAT

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