1 transmitting data and address characters, 2 wired-or mode, 3 idle line wakeup – Motorola DSP56301 User Manual
Page 239: 4 address mode wakeup, 2 i/o signals, Transmitting data and address characters -3, Wired-or mode -3, Idle line wakeup -3, Address mode wakeup -3, I/o signals -3