STM32F446MC datasheet(35/201 Pages) STMICROELECTRONICS

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STM32F446xC/E

Functional overview

The SPI interface can be configured to operate in TI mode for communications in master

mode and slave mode.

3.25

HDMI (high-definition multimedia interface) consumer

electronics control (CEC)

The devices embeds a HDMI-CEC controller that provides hardware support of consumer

electronics control (CEC) (Appendix supplement 1 to the HDMI standard).

This protocol provides high-level control functions between all audiovisual products in an

environment. It is specified to operate at low speeds with minimum processing and memory

overhead.

3.26

Inter-integrated sound (I2S)

Three standard I2S interfaces (multiplexed with SPI1, SPI2 and SPI3) are available. They

can be operated in master or slave mode, in simplex communication modes, and can be

configured to operate with a 16-/32-bit resolution as an input or output channel. Audio

sampling frequencies from 8 kHz up to 192 kHz are supported. When either or both of the

I2S interfaces is/are configured in master mode, the master clock can be output to the

external DAC/CODEC at 256 times the sampling frequency.

All I2Sx can be served by the DMA controller.

3.27

SPDIF-RX Receiver Interface (SPDIFRX)

The SPDIF-RX peripheral, is designed to receive an S/PDIF flow compliant with IEC-60958

and IEC-61937. These standards support simple stereo streams up to high sample rate,

and compressed multi-channel surround sound, such as those defined by Dolby or DTS (up

to 5.1).

The main features of the SPDIF-RX are the following:

•

Up to 4 inputs available

•

Automatic symbol rate detection

•

Maximum symbol rate: 12.288 MHz

•

Stereo stream from 32 to 192 kHz supported

•

Supports Audio IEC-60958 and IEC-61937, consumer applications

•

Parity bit management

•

Communication using DMA for audio samples

•

Communication using DMA for control and user channel information

•

Interrupt capabilities

The SPDIF-RX receiver provides all the necessary features to detect the symbol rate, and

decode the incoming data stream.

The user can select the wanted SPDIF input, and when a valid signal will be available, the

SPDIF-RX will re-sample the incoming signal, decode the Manchester stream, recognize

frames, sub-frames and blocks elements. It delivers to the CPU decoded data, and

associated status flags.

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