50.14 Reset, WDT, Oscillator Start-Up Timer, Power-Up Timer, Brown-Out Reset and Low-Power Brown-Out Reset Specifications

Figure 50-7. Reset, Watchdog Timer, Oscillator Start-Up Timer and Power-Up Timer Timing

Figure 50-8. Brown-out Reset Timing and Characteristics

Table 50-11. Resets
Standard Operating Conditions (unless otherwise stated)
Param No.	Sym.	Characteristic	Min.	Typ. †	Max.	Units	Conditions
RST01*	T_MCLR	MCLR Pulse Width Low to ensure Reset	—	355	—	ns
RST02*	T_IOZ	I/O high-impedance from Reset detection	—	—	2	μs
RST03	T_WDT	Watchdog Timer Time-out Period	—	2	—	ms	WDTCPS = `'b00100`
RST04*	T_PWRT	Power-up Timer Period	—	65	—	ms
RST05	T_OST	Oscillator Start-up Timer Period^(1,2)	—	1024	—	T_OSC
RST06	V_BOR	Brown-out Reset Voltage	2.7	2.85	3.0	V	BORV = `'b00`
RST06A			2.55	2.7	2.85	V	BORV = `'b01`
RST06B			2.3	2.45	2.6	V	BORV = `'b10`
RST06C			1.8	1.9	2.1	V	BORV = `'b11`
RST07	V_BORHYS	Brown-out Reset Hysteresis	—	60	—	mV	BORV = `'b00`
RST08	T_BORDC	Brown-out Reset Response Time	—	3	—	μs
RST09	V_LPBOR	Low-Power Brown-out Reset Voltage	1.8	1.9	2.3	V
* 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. Note: By design, the Oscillator Start-up Timer (OST) counts the first 1024 cycles, independent of frequency. To ensure these voltage tolerances, V_DD and V_SS must be capacitively decoupled as close to the device as possible. 0.1 μF and 0.01 μF values in parallel are recommended.