I2s interfaces – Kontron SMARC-sA3874i User Manual
Page 37
37
www.kontron.com
User’s Guide
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
TI Cortex A8 CPU
Net Name
Notes
Pin #
Pin Name
Pin #
Pin Name
I2S0
S39
I2S0_LRCK
L3
MCA[0]_AFSX
I2S0_LRCK
Left& Right audio
synchronization clock
S40
I2S0_SDOUT
J1
MCA[0]_AXR[1]/I2C[3]_SCL
I2S0_SDOUT
Digital audio Output
S41
I2S0_SDIN
J2
MCA[0]_AXR[0]/VCX_VIC[1]
I2S0_SDIN
Digital audio Input
S42
I2S0_CK
R4
MCA[0]_ACLKX
I2S0_CK
Digital audio clock
I2S1
S43
I2S1_LRCK
H4
MCA[3]_AFSX/GP0[17]
I2S1_LRCK
Left& Right audio
synchronization clock
S44
I2S1_SDOUT
G2
MCA[3]_AXR[1]/TIM5_IO/GP0[19] I2S1_SDOUT
Digital audio Output
S45
I2S1_SDIN
G1
MCA[3]_AXR[0]/TIM4_IO/GP0[18] I2S1_SDIN
Digital audio Input
S46
I2S1_CK
G6
MCA[3]_ACLKX/GP0[16]
I2S1_CK
Digital audio clock
I2S2
S50
I2S2_LRCK
H3
MCA[4]_AFSX/GP0[22]
I2S2_LRCK
Left& Right audio
synchronization clock
S51
I2S2_SDOUT
J4
MCA[4]_AXR[1]/TIM6_IO/GP0[24] I2S2_SDOUT
Digital audio Output
S52
I2S2_SDIN
H6
MCA[4]_AXR[0]/GP0[23]
I2S2_SDIN
Digital audio Input
S53
I2S2_CK
K7
MCA[4]_ACLKX/GP0[21]
I2S2_CK
Digital audio clock
Audio Master clock
S38
AUDIO_MCK
H1
AUD_CLKIN2
AUDIO_MCK
Master clock output to
Audio codec