Timer0 and Timer1 External Clock Requirements

Table 1.
Standard Operating Conditions (unless otherwise stated) Operating Temperature: -40°C ≤ T_A ≤ +125°C
Param No.	Sym.	Characteristic		Min.	Typ. †	Max.	Units	Conditions
40*	T_T0H	T0CKI High Pulse Width	No Prescaler	0.5T_CY+20	—	—	ns
40*	T_T0H	T0CKI High Pulse Width	With Prescaler	10	—	—	ns
41*	T_T0L	T0CKI Low Pulse Width	No Prescaler	0.5T_CY+20	—	—	ns
41*	T_T0L	T0CKI Low Pulse Width	With Prescaler	10	—	—	ns
42*	T_T0P	T0CKI Period		—	—	—	ns	N = Prescale value
45*	T_T1H	T1CKI High Time	Synchronous, No Prescaler	0.5T_CY+20	—	—	ns
			Synchronous, with Prescaler	15	—	—	ns
			Asynchronous	30	—	—	ns
46*	T_T1L	T1CKI Low Time	Synchronous, No Prescaler	0.5T_CY+20	—	—	ns
			Synchronous, with Prescaler	15	—	—	ns
			Asynchronous	30	—	—	ns
47*	T_T1P	T1CKI Input Period	Synchronous	—	—	—	ns	N = Prescale value
47*	T_T1P	T1CKI Input Period	Asynchronous	60	—	—	ns
49*	TCKEZ_TMR1	Delay from External Clock Edge to Timer Increment		2 T_OSC	—	7 T_OSC	—	Timers in Sync mode
* - These parameters are characterized but not tested. † Data in ‘Typ’ column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Figure 1. Timer0 and Timing1 External Clock Timings