STM32F779IGH7 datasheet(50/255 Pages) STMICROELECTRONICS

50 / 255 page

Functional overview

STM32F777xx STM32F778Ax STM32F779xx

50/255

DocID028294 Rev 4

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Automatic data offset correction (offset stored in register by user)

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Continuous or single conversion

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Start-of-conversion triggered by:

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Software trigger

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Internal timers

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External events

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Start-of-conversion synchronously with first digital filter module (DFSDM0)

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Analog watchdog feature:

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Low value and high value data threshold registers

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Dedicated configurable Sincx digital filter (order = 1..3, oversampling ratio = 1..32)

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Input from final output data or from selected input digital serial channels

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Continuous monitoring independently from standard conversion

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Short circuit detector to detect saturated analog input values (bottom and top range):

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Up to 8-bit counter to detect 1..256 consecutive 0’s or 1’s on serial data stream

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Monitoring continuously each input serial channel

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Break signal generation on analog watchdog event or on short circuit detector event

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Extremes detector:

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Storage of minimum and maximum values of final conversion data

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Refreshed by software

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DMA capability to read the final conversion data

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Interrupts: end of conversion, overrun, analog watchdog, short circuit, input serial

channel clock absence

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“regular” or “injected” conversions:

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“regular” conversions can be requested at any time or even in continuous mode

without having any impact on the timing of “injected” conversions

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“injected” conversions for precise timing and with high conversion priority

2.44

Temperature sensor

The temperature sensor has to generate a voltage that varies linearly with the temperature.

The conversion range is between 1.7 V and 3.6 V. The temperature sensor is internally

connected to the same input channel as VBAT, ADC1_IN18, which is used to convert the

sensor output voltage into a digital value. When the temperature sensor and VBAT

conversion are enabled at the same time, only VBAT conversion is performed.

As the offset of the temperature sensor varies from chip to chip due to process variation, the

internal temperature sensor is mainly suitable for applications that detect temperature

changes instead of absolute temperatures. If an accurate temperature reading is needed,

then an external temperature sensor part should be used.

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