Avnet SMARC MSC SM2S-IMX8M, User Manual, Page: 27 / 92

MSC SM2S-IMX8M User Manual 27 / 92
4.1 I²S
The module provides two I²S Links for connecting I²S codecs on the carrier board. Driver support for I²S is only available for Linux.
Some features:
• Programmable data interface modes such as I2S, LSB or MSB-justified
• Programmable word length (16, 20, 24 or 28bits)
• AC97 and TDM support
• Time Slot Mask Registers for reduced ARM platform overhead (for both Transmit and Receive)
• 128-word Transmit FIFO and 128-word Receive FIFO
Table 4-1: I²S Signal Description
Signal Pin Type
Signal
Level Pin on
i.MX8M Pin name on
i.MX8M Power
Tolerance
PU/PD Description
I2S0_LRCK O PP 1.8V CMOS H4 SAI2_TXFS 1.8V Sample-synchronization signal to the codec(s).
I2S0_CK O PP 1.8V CMOS J5 SAI2_TXC 1.8V Serial data clock
I2S0_SDOUT O PP 1.8V CMOS G5 SAI2_TXD0 1.8V Serial TDM data output to the codec.
I2S0_SDIN I 1.8V CMOS H6 SAI2_RXD0 1.8V Serial TDM data inputs from the codec.
I2S2_LRCK O PP 1.8V CMOS G2 SAI3_TXFS 1.8V Sample-synchronization signal to the codec(s).
I2S2_CK O PP 1.8V CMOS C4 SAI3_TXC 1.8V Serial data clock
I2S2_SDOUT O PP 1.8V CMOS C3 SAI3_TXD 1.8V Serial TDM data output to the codec.
I2S2_SDIN I 1.8V CMOS F3 SAI3_RXD 1.8V Serial TDM data inputs from the codec.
AUDIO_MCK O PP 1.8V CMOS K7 GPIO1_IO14 1.8V Clock Output (CCM_CLKO1)