
3.2.19 I2S Interfaces
The ULP-COM sA3874i module supports three off-Module I2S (DAP) interfaces. The default ULP-COM audio
interface is I2S0 and the Kontron sA3874i bootloader implements this. The other I2S ports may be used for audio
(if the bootloader is re-configured for this) or may be used for other devices that accept an I2S interface.
I2S interface signals are exposed on the ULP-COM sA3874i edge connector as shown below:
ULP-COM sA3874i Edge
finger
Left& Right audio
synchronization clock
Left& Right audio
synchronization clock
MCA[3]_AXR[1]/TIM5_IO/GP0[19]
MCA[3]_AXR[0]/TIM4_IO/GP0[18]
Left& Right audio
synchronization clock
MCA[4]_AXR[1]/TIM6_IO/GP0[24]
Master clock output to
Audio codec
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