STM32L552CC_V01 datasheet(65/340 Pages) STMICROELECTRONICS

65 / 340 page

DS12737 Rev 6

65/340

STM32L552xx

Functional overview

The DFSDM peripheral supports:

•

Up to 4 multiplexed input digital serial channels:

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Configurable SPI interface to connect various Σ∆ modulators

–

Configurable Manchester coded 1 wire interface support

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Clock output for Σ∆ modulator(s)

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Alternative inputs from up to 4 internal digital parallel channels:

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Inputs with up to 16 bit resolution

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Internal sources: ADCs data or memory (CPU/DMA write) data streams

•

Adjustable digital signal processing:

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Sincx filter: filter order/type (1..5), oversampling ratio (up to 1..1024)

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Integrator: oversampling ratio (1..256)

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Up to 24-bit output data resolution:

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Right bit-shifter on final data (0..31 bits)

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Signed output data format

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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 synchronization with:

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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 DFSDM filter (DFSDM_FLT0)

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Analog watchdog feature:

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Low value and high value data threshold registers

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

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Input from output data register or from one or more 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 ranges):

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

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Mnitoring continuously each channel (4 serial channel transceiver outputs)

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

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Extremes detector:

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Store minimum and maximum values of output data values

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Refreshed by software

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DMA may be used to read the conversion data

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Interrupts: end of conversion, overrun, analog watchdog, short-circuit, 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.

STM32L552CC 数据表(PDF) 65 Page - STMicroelectronics

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