STM32WBA62CG datasheet(67/185 Pages) STMICROELECTRONICS

67 / 185 page

DS14736 Rev 1

67/185

STM32WBA6xxx

Functional overview

3.34

Serial audio interfaces (SAI)

The devices embed one SAI, see Table 21 for its features. The SAI bus interface handles

communications between the microcontroller and the serial audio protocol.

The SAI peripheral supports:

•

Two independent audio sub-blocks that can be transmitters or receivers with their

respective FIFOs

•

8-word integrated FIFOs for each audio sub-block

•

Synchronous or Asynchronous mode between the audio sub-blocks

•

Master or slave configuration independent for both audio sub-blocks

•

Clock generator for each audio block to target independent audio frequency sampling

when both audio sub-blocks are configured in master mode

•

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

•

Peripheral with large configurability and flexibility allowing to target as example the

following audio protocol: I2S, LSB or MSB-justified, PCM/DSP, TDM, AC’97 and SPDIF

out

•

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

Table 21. SAI implementation

Features

SAI1

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-, and 32-bit

STM32WBA62CG Datasheet(PDF) 67 Page - STMicroelectronics

STM32WBA62CG Datasheet(HTML) 67 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL