SN32F280 Series
32-Bit Cortex-M0 Micro-Controller
SONiX TECHNOLOGY CO., LTD
Page 184
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I2S
16.1 OVERVIEW
The I2S bus specification defines a 5-wire serial bus, having data in, data out, BCLK, MCLK, and word select signal.
The
basic I2S connection has one master, which is always the master, and one slave.
16.2 FEATURES
I2S can operate as either master or slave.
Capable of handling 8/16/24/32-bit data length.
Mono and stereo audio data supported.
I2S and MSB justified data format supported.
8 word (32-bit) FIFO data buffers are provided.
Generate interrupt requests when buffer levels cross a programmable boundary.
Controls include reset, stop and mute options separately for I2S input and I2S output.
16.3 PIN DESCRIPTION
Pin Name
Type
Description
GPIO Configuration
I2SBCLK
O
I2S Bit clock (Master)
I
I2S Bit clock (Slave)
Depends on GPIOn_CFG
I2SWS
O
I2S Word Select (Master)
I
I2S Word Select (Slave)
Depends on GPIOn_CFG
I2SDIN
I
I2S Received Serial data
Depends on GPIOn_CFG
I2SDOUT
O
I2S Transmitted Serial data
I2SMCLK
O
I2S Master clock output
I
I2S Master clock input from GPIO
Depends on GPIOn_CFG
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