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i.MX8M SMARC SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.8.1
SAI Interface
The Synchronous Audio Interface (SAI) module provides a synchronous audio interface that supports full duplex serial
interfaces with frame synchronization, such as I2S, AC97, TDM, and codec/DSP interfaces.
Most of SAI signals are Multiplexed with boot configuration pin. Make sure that these pins are not driven by external
source before successful boot.
SAI1 of i.MX8M Processor is connected to board expansion connector, refer below table:
Exp.
Pin No
Signal Name
CPU Ball Name/
Pin Number
Signal Type/
Termination
Description
1
SAI1_TXD0
SAI1_TXD0/
F2
O, 1.8V CMOS/
10K PD
SAI1 Transmit Data 0.
15
SAI1_TXD1
SAI1_TXD1/
E2
O, 1.8V CMOS/
10K PD
SAI1 Transmit Data 1.
5
SAI1_TXD2
SAI1_TXD2/
B2
O, 1.8V CMOS/
10K PD/1K PU
SAI1 Transmit Data 2.
Note: Termination will differ based on
boot media selection.
7
SAI1_TXD3
SAI1_TXD3/
D1
O, 1.8V CMOS/
10K PD
SAI1 Transmit Data 3.
9
SAI1_TXD4
SAI1_TXD4/
D2
O, 1.8V CMOS/
10K PD/1K PU
SAI1 Transmit Data 4.
Note: Termination will differ based on
boot media selection.
11
SAI1_TXD5
SAI1_TXD5/
C2
O, 1.8V CMOS/
10K PD/1K PU
SAI1 Transmit Data 5.
Note: Termination will differ based on
boot media selection.
3
SAI1_TXD6
SAI1_TXD6/
B3
O, 1.8V CMOS/
10K PD/1K PU
SAI1 Transmit Data 6.
Note: Termination will differ based on
boot media selection.
13
SAI1_TXD7
SAI1_TXD7/
C1
O, 1.8V CMOS/
10K PD
SAI1 Transmit Data 7.
19
SAI1_TXFS
SAI1_TXFS/
H1
O, 1.8V CMOS
SAI1 Transmit Frame Sync Output.
21
SAI1_TXC
SAI1_TXC/
E1
O, 1.8V CMOS
SAI1 Transmit Clock Input.
35
SAI1_RXD0
SAI1_RXD0/
K2
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 0.
37
SAI1_RXD1
SAI1_RXD1/
L2
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 1.
39
SAI1_RXD2
SAI1_RXD2/
H2
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 2..
47
SAI1_RXD3
SAI1_RXD3/
J2
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 3.
43
SAI1_RXD4
SAI1_RXD4/
J1
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 4.
41
SAI1_RXD5
SAI1_RXD5/
F1
I, 1.8V CMOS/
10K PD
SAI1 Receiver Data 5.