External Amplifier Power DownEAPD Application Note
Definition:
The term EAPD stands for External Amplifier Power Down. Logical Operation:
Although named External Amplifier Power Down by the Intel HD Audio Specification, this signal logically operates as an external amplifier POWER UP signal. A logic 1 on this signal is meant to cause an external amplifier to power up and a logic 0 is meant to cause an external amplifier to power down.