female connector:

pin13    CEC (Consumer Electronics Control, communication between equipment)
pin14    from v1.4: HEAC data- (Hdmi Ethernet Channel and Audio Return Channel)
pin15    SCL (serial clock for DDC, Display Data Channel which communicates extended display ID information)
pin16    SDA (serial data for DDC)
pin17    DDC/CEC/HEAC ground
pin18    +5V power (50mA max)
pin19    Hot plug detect & from v1.4: HEAC data+ (Hdmi Ethernet Channel and Audio Return Channel)