This key defines how pins for first Digital Mic instance (instance 0) are configured. The octet string key value contains a value each for the CLK_OUT & DATA_IN signal lines in that order. Each signal can be specified to use 0x00 - 0x5F: PIO number or If the signal is not required, it should be set to 0xFF: Unused If multiple digital mic instances share the same clock pin, set the CLK_OUT signal on any one of the instances to the required PIO number and set it to Unused on all the other instances. All digital mic channels that share a clock in this way must be placed in a sync group. Also, digital mic endpoints on the instance that defines CLK_OUT should be connected first for the clock to be enabled.
