STM32L476RG datasheet(41/232 Pages) STMICROELECTRONICS

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STM32L476xx

Functional overview

3.21

Liquid crystal display controller (LCD)

The LCD drives up to 8 common terminals and 44 segment terminals to drive up to 320

pixels.

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Internal step-up converter to guarantee functionality and contrast control irrespective of

VDD. This converter can be deactivated, in which case the VLCD pin is used to provide

the voltage to the LCD

•

Supports static, 1/2, 1/3, 1/4 and 1/8 duty

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Supports static, 1/2, 1/3 and 1/4 bias

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Phase inversion to reduce power consumption and EMI

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Integrated voltage output buffers for higher LCD driving capability

•

Up to 8 pixels can be programmed to blink

•

Unneeded segments and common pins can be used as general I/O pins

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LCD RAM can be updated at any time owing to a double-buffer

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The LCD controller can operate in Stop mode

3.22

Digital filter for Sigma-Delta Modulators (DFSDM)

The device embeds one DFSDM with 4 digital filters modules and 8 external input serial

channels (transceivers) or alternately 8 internal parallel inputs support.

The DFSDM peripheral is dedicated to interface the external Σ∆ modulators to

microcontroller and then to perform digital filtering of the received data streams (which

represent analog value on Σ∆ modulators inputs). DFSDM can also interface PDM (Pulse

Density Modulation) microphones and perform PDM to PCM conversion and filtering in

hardware. DFSDM features optional parallel data stream inputs from microcontrollers

memory (through DMA/CPU transfers into DFSDM).

DFSDM transceivers support several serial interface formats (to support various Σ∆

modulators). DFSDM digital filter modules perform digital processing according user

selected filter parameters with up to 24-bit final ADC resolution.

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