1 gpio ieee 1588 timestamping, 1 ieee 1588 gpio inputs, 2 ieee 1588 gpio outputs – SMSC LAN9312 User Manual
Page 163: 2 gpio interrupts, 1 gpio interrupt polarity, Ieee 1588 gpio inputs, Ieee 1588 gpio outputs, Gpio interrupt polarity, Section 13.2.1, "gpio, For inf