User's Manual l TQMa8MxML UM 0103 l © 2022, TQ-Systems GmbH
Page 34
3.2.5.9
SAI
Because of the focus on audio functions, i.MX 8M Mini and i.MX 8M Nano offer several SAI interfaces. These are partially full-
duplex capable. I
2
S, AC97, TDM and other codecs are supported, but they have to be implemented on the carrier board.
The supply voltage of all SAI interfaces is set to 3.3 V by the TQMa8MxML.
The i.MX 8M Nano does not provide the SAI1 interface. Therefore, external signal termination is required for TQMa8MxNL
modules. 10 kΩ to Ground are recommended. Clock pins can be used as input or output.
i.MX 8M Mini
LGA
SAI1_TXC
SAI1_TXFS
SAI1_RXC
SAI1_TXD[7:0]
SAI1_TXC
SAI1_TXFS
SAI1_TXD[7:0]
SAI1_RXC
SAI1_RXFS
SAI1_RXFS
SAI1_RXD[7:0]
SAI1_RXD[7:0]
SAI1_MCLK
SAI1_MCLK
Figure 15: Block diagram SAI1
The signals of SAI2, SAI3 and SA5 are routed to the LGA pads in the same way, see Table 28.
Note: TQMa8MxNL, termination of SAI1 interface pins
The TQMa8MxNL does not offer the SAI1 interface. The i.MX 8M Nano nevertheless features the pins,
which are connected to the LGA pads of the TQMa8MxNL. Therefore, it is recommended to terminate
the signals externally when using the TQMa8MxNL.
There is no exact specification, which is why 10 kΩ to Ground are recommended.