42.4.13 Timer0 and Timer1 External Clock Requirements

Table 42-18.
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	0.5T_CY+20	—	—	ns	No Pre-scaler
40A*	T_T0H	T0CKI High Pulse Width	10	—	—	ns	With Pre-scaler
41*	T_T0L	T0CKI Low Pulse Width	0.5T_CY+20	—	—	ns	No Pre-scaler
41A*	T_T0L	T0CKI Low Pulse Width	10	—	—	ns	With Pre-scaler
42*	T_T0P	T0CKI Period	Greater of: 20 or (T_CY+40)/N	—	—	ns	N = Pre-scale value
45*	T_T1H	T1CKI High Time	0.5T_CY+20	—	—	ns	Synchronous, no Pre-scaler
45A*			15	—	—	ns	Synchronous, with Pre-scaler
45B*			30	—	—	ns	Asynchronous
46*	T_T1L	T1CKI Low Time	0.5T_CY+20	—	—	ns	Synchronous, no Pre-scaler
46A*			15	—	—	ns	Synchronous, with Pre-scaler
46B*			30	—	—	ns	Asynchronous
47*	T_T1P	T1CKI Input Period	Greater of: 30 or (T_CY+40)/N	—	—	ns	Synchronous, N = Pre-scale value
47A*	T_T1P	T1CKI Input Period	60	—	—	ns	Asynchronous
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 42-11. Timer0 and Timing1 External Clock Timings