2185 - [MachXO] For the MachXO's Idk (hot socketing leakage spec), what factors control whether the Idk is sourced or sink?

2185 - [MachXO] For the MachXO's Idk (hot socketing leakage spec), what factors control whether the Idk is sourced or sink?

The phenomena is a spike which occurs when ramping a pad above and below VCCIO. There is a circuit which controls the NWELL voltage of the PMOS driver. The NWELL tracks VCCIO when the pad is below VCCIO and the NWELL tracks the PAD voltage when the PAD is above VCCIO. The spike occurs when there is a transition from low to above VCCIO (sink spike) and from above VCCIO to below (source spike).