8.3 AC Parameters: All I/O Interfaces

Table 8-2. AC Parameters: All I/O Interfaces

Parameter	Sym.	Direction	Min.	Typ.	Max.	Units	Conditions
Power-Up Delay(2)	tPU	To Crypto Device	100	—	—	µs	Minimum time between VCC > VCC min prior to start of tWLO.
Wake Low Duration	tWLO	To Crypto Device	60	—	—	µs
Wake High Delay to Data Comm	tWHI	To Crypto Device	1500	—	—	µs	SDA should be stable high for this entire duration unless polling is implemented. SelfTest is not enabled at power-up.
Wake High Delay when SelfTest is Enabled	tWHIST	To Crypto Device	20	—	—	ms	SDA should be stable high for this entire duration unless polling is implemented.
High-Side Glitch Filter at Active	tHIGNORE_A	To Crypto Device	45(1)	—	—	ns	Pulses shorter than this in width will be ignored by the device, regardless of its state when active.
Low-Side Glitch Filter at Active	tLIGNORE_A	To Crypto Device	45(1)	—	—	ns	Pulses shorter than this in width will be ignored by the device, regardless of its state when active.
Low-Side Glitch Filter at Sleep	tLIGNORE_S	To Crypto Device	15(1)	—	—	µs	Pulses shorter than this in width will be ignored by the device when in Sleep mode.
Watchdog Time-out	tWATCHDOG	To Crypto Device	0.7	1.3	1.7	s	Time from wake until device is forced into Sleep mode if Config.ChipMode[2] is 0.

Note:

1. These parameters are characterized, but not production tested.
2. The power-up delay will be significantly longer if power-on self test is enabled in the Configuration zone.