45.6.12 Loop-back Mode

For debug purposes, the I2SMCC can be configured to loop back the transmitter to the receiver. Writing a ’1’ to I2SMCC_MRA.RXLOOP internally connects I2SMCC_DOUTx to I2SMCC_DINx, so that the transmitted data is also received. Writing a ’0’ to I2SMCC_MRA.RXLOOP restores the normal behavior with independent receiver and transmitter. As for other changes to the receiver or transmitter configuration, the I2SMCC receiver and transmitter must be disabled before writing to I2SMCC_MRA to update I2SMCC_MRA.RXLOOP.