Including control data in a serial audio stream

A device, comprising:

• a clock pin;
• a frame pin;
• a data pin;
• a bit clock component configured to receive, via the clock pin, a bit clock signal from a master device;
• a phase clock component configured to receive, via the frame pin, a frame clock signal from the master device;
• and
• a data component configured to:
• send, via the data pin during a first portion of a first phase of a period of the frame clock signal, slave data directed to the master device on a bit-by-bit basis based on the bit clock signal according to an integrated interchip sound (I2S) based protocol;
• and
• receive, via the data pin during a second portion of the first phase of the period after the first portion of the first phase of the period, a first part of a set of control bits from the master device on the bit-by-bit basis based on the bit clock signal.

A method, comprising:

• sending, by a master device via a clock pin, a bit clock signal directed to a slave device;
• sending, by the master device via a frame clock pin, a frame clock signal directed to the slave device;
• receiving, by the master device via a data pin during a first portion of a first phase of a period of the frame clock signal, a first set of slave data from the slave device on a bit-by-bit basis based on the bit clock signal and an integrated interchip sound (I2S) based protocol;
• and
• sending, by the master device via the data pin during a second portion of the first phase of the period after the first portion of the first phase of the period, first control data directed to the slave device on the bit-by-bit basis based on the bit clock signal.