Datasheet
2009-2016 Microchip Technology Inc. DS40001365F-page 345
PIC18(L)F1XK22
TABLE 26-16: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,
AND BROWN-OUT RESET PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Param.
No.
Sym. Characteristic Min. Typ.† Max. Units Conditions
30 TMCLMCLR Pulse Width (low) 2
5
—
—
—
—
s
s
VDD = 3.3-5V, -40°C to +85°C
V
DD = 3.3-5V
31 T
WDT Standard Watchdog Timer Time-out
Period (1:16 Prescaler)
10
10
17
17
27
30
ms
ms
VDD = 3.3V-5V, -40°C to +85°C
V
DD = 3.3V-5V
31A TWDTLP Low-Power Watchdog Timer
Time-out Period (No Prescaler)
10
10
18
18
27
33
ms
ms
VDD = 3.3V-5V, -40°C to +85°C
V
DD = 3.3V-5V
32 TOST Oscillator Start-up Timer Period
(1,2)
—1024—TOSC (Note 3)
33* TPWRT Power-up Timer Period,
PWRTE
= 0
40 65 140 ms
34* T
IOZ I/O high-impedance from MCLR
Low or Watchdog Timer Reset
——2.73s
35 V
BOR Brown-out Reset Voltage 1.75
2.05
2.35
2.65
1.9
2.2
2.5
2.85
2.05
2.35
2.65
3.05
V
V
V
V
BORV = 1.9V
(5)
BORV = 2.2V
(5)
BORV = 2.7V
BORV = 2.85V
36* V
HYST Brown-out Reset Hysteresis 0 25 50 mV -40°C to +85°C
37* TBORDC Brown-out Reset DC Response
Time
0335sVDD VBOR
* These parameters are characterized but not tested.
† Data in “Typ” column is at 3V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1: Instruction cycle period (T
CY) equals four times the input oscillator time base period. All specified values are
based on characterization data for that particular oscillator type under standard operating conditions with
the device executing code. Exceeding these specified limits may result in an unstable oscillator operation
and/or higher than expected current consumption. All devices are tested to operate at “min” values with an
external clock applied to the OSC1 pin. When an external clock input is used, the “max” cycle time limit is
“DC” (no clock) for all devices.
2: By design.
3: Period of the slower clock.
4: To ensure these voltage tolerances, V
DD and VSS must be capacitively decoupled as close to the device as
possible. 0.1 F and 0.01 F values in parallel are recommended.
5: PIC18LF1XK22 devices only.