STM32WBA50KG datasheet(35/110 Pages) STMICROELECTRONICS

35 / 110 page

DS14688 Rev 1

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STM32WBA50KG

Functional overview

The analog watchdog feature allows the application to detect if the input voltage goes

outside the user-defined higher or lower thresholds.

An efficient low-power mode is implemented to allow very low consumption at low

frequency. The ADC4 is autonomous in low-power modes down to Stop modes.

A built-in hardware oversampler allows analog performances to be improved while

off-loading the related computational burden from the CPU.

The ADC4 main features are:

•

High performance

–

12-, 10-, 8- or 6-bit configurable resolution

–

ADC conversion time: 0.4 µs for 12-bit resolution (2.5 MHz), faster conversion

times obtained by lowering resolution

–

Self-calibration

–

Programmable sampling time

–

Data alignment with built-in data coherency

–

DMA support

•

Low-power

–

PCLK frequency reduced for low-power operation while still keeping optimum

ADC performance

–

Wait mode: ADC overrun prevented in applications with low frequency PCLK

–

Auto-off mode: ADC automatically powered off except during the active

conversion phase, dramatically reducing the ADC power consumption

–

Autonomous mode: In low-power modes down to Stop 1 mode, the ADC4 is

automatically switched on when a trigger occurs to start conversion, and it is

automatically switched off after conversion. Data are transfered to SRAM with

DMA.

–

ADC4 interrupts wake up the device from Stop modes.

•

Analog input channels

–

Eight external analog inputs

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One channel for the internal temperature sensor (VSENSE)

–

One channel for the internal reference voltage (VREFINT)

–

One channel for the internal digital core voltage (VCORE)

•

Start-of-conversion can be initiated:

–

By software

–

By hardware triggers with configurable polarity (timer events or GPIO input

events)

•

Conversion modes

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Conversion of a single channel or scan of a sequence of channels

–

Selected inputs converted once per trigger in Single mode

–

Selected inputs converted continuously in Continuous mode

–

Discontinuous mode

•

Interrupt generation at the end of sampling, end of conversion, end of sequence

conversion, and in case of analog watchdog or overrun events, with wake-up from Stop

capability

•

Three analog watchdogs

STM32WBA50KG Datasheet(PDF) 35 Page - STMicroelectronics

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