Datasheet

Functional overview STM32H743xI
42/226 DocID030538 Rev 3
3.35 SPDIFRX Receiver Interface (SPDIFRX)
The SPDIFRX 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 SPDIFRX features 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 SPDIFRX receiver provides all the necessar
y 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 SPDIFRX 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.
The SPDIFRX also offers a signal named spdif_fr
ame_sync, which toggles at the S/PDIF
sub-frame rate that will be used to compute the exact sample rate for clock drift algorithms.
3.36 Single wire protocol master interface (SWPMI)
The Single wire protocol master interface (SWPMI) is the master interface corresponding to
the Contactless Frontend (CLF) defined in the ETSI TS 102 613 technical specification. The
main features are:
• full-
duplex communication mode
• automatic SWP bus state management (active, suspend, resume)
• configurable bitrate up to 2 Mbit/s
• automatic SOF, EOF and CRC handling
SWPMI can be served by the DMA controller.
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