STM32WBA62CGF6 datasheet(31/185 Pages) STMICROELECTRONICS

31 / 185 page

DS14736 Rev 1

31/185

STM32WBA6xxx

Functional overview

Figure 4. Power supply overview (without SMPS)

During power-up and power-down phases, the following power sequence requirements

must be respected:

•

When VDD is below 1 V, other power supplies (namely VDDA, VDDIO2, VDDUSB) must

remain below VDD + 300 mV.

•

When VDD is equal to or above 1 V, other power supplies are independent.

•

During the power-down phase, VDD can temporarily become lower than other supplies

only if the energy provided to the MCU remains below 1 mJ. This allows external

decoupling capacitors to be discharged with different time constants during the power-

down transient phase.

MSv56535V1

Core

SRAM1

SRAM2

Digital

peripherals

Standby circuitry

Wake-up logic, IWDG

VDDA domain

Backup domain

LDO regulator

I/O ring

VCORE domain

Reset block

Temperature sensor

PLL, internal oscillators

Flash memory

VDDA

VSSA

(3)

VDD domain

VCORE

VSS

(Exposed pad)

(1)

VDD

VCAP

Voltage regulator

VDDRF

VDDRFPA

RADIO domain

VDDHPA

VSSRF

(3)

2.4 GHz RADIO

(1) Exposed pad is available only on QFN packages.

(2) Not available on all packages.

(3) Not available on all packages (when not available connected to VSS pin).

(4) Not available on all packages (when not available connected to VDDA pin).

VREF+

(4)

VSS

LSE crystal 32 kHz oscillator

RTC, TAMP, Backup

registers, RCC_BDCR1

ADC

Comparators

Voltage reference buffer

USB OTG

VDDUSB

(2)

VDDIO2

(2)

I/O2 ring

STM32WBA62CGF6 Datasheet(PDF) 31 Page - STMicroelectronics

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