STM32L552CET6PTR datasheet(76/340 Pages) STMICROELECTRONICS

76 / 340 page

Functional overview

STM32L552xx

76/340

DS12737 Rev 6

•

Up to 16 slots available with configurable size and with the possibility to select which

ones are active in the audio frame.

•

Number of bits by frame may be configurable.

•

Frame synchronization active level configurable (offset, bit length, level).

•

First active bit position in the slot is configurable.

•

LSB first or MSB first for data transfer.

•

Mute mode.

•

Stereo/Mono audio frame capability.

•

Communication clock strobing edge configurable (SCK).

•

Error flags with associated interrupts if enabled respectively.

–

Overrun and underrun detection.

–

Anticipated frame synchronization signal detection in slave mode.

–

Late frame synchronization signal detection in slave mode.

–

Codec not ready for the AC’97 mode in reception.

•

Interruption sources when enabled:

–Errors.

–

FIFO requests.

•

DMA interface with two dedicated channels to handle access to the dedicated

integrated FIFO of each SAI audio sub-block.

3.38

Secure digital input/output and MultiMediaCards Interface

(SDMMC)

The SD/SDIO, MultiMediaCard (MMC) host interface (SDMMC) provides an interface

between the AHB bus and SD memory cards, SDIO cards and MMC devices.

Table 19. SAI implementation

SAI features(1)

1. X: supported

SAI1

SAI2

I2S, LSB or MSB-justified, PCM/DSP, TDM, AC’97

Mute mode

Stereo/Mono audio frame capability.

16 slots

Data size configurable: 8-, 10-, 16-, 20-, 24-, 32-bit

FIFO size

X (8 Word)

SPDIF

PDM

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