English
Language : 

PIC18LF2X_13 Datasheet, PDF (453/560 Pages) Microchip Technology – PIC18(L)F2X/45K50 USB Flash MCU Product Brief
PIC18(L)F2X/4XK22
TABLE 27-11: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET REQUIREMENTS
Param.
No.
Symbol
Characteristic
Min Typ Max Units
Conditions
30
TmcL MCLR Pulse Width (low)
2
—
—
s
31
TWDT Watchdog Timer Time-out Period
(no postscaler)
3.5
4.1
4.7
ms 1:1 prescaler
32
TOST Oscillation Start-up Timer Period 1024 TOSC — 1024 TOSC — TOSC = OSC1 period
33
TPWRT Power-up Timer Period
54.8 64.4 74.1
ms
34
TIOZ I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
35
TBOR Brown-out Reset Pulse Width
—
2
—
2001
—
—
s
s VDD  BVDD (see
D005)
36
TIVRST Internal Reference Voltage Stable
—
25
35
37
THLVD High/Low-Voltage Detect Pulse
Width
2001
—
—
s
s VDD  VHLVD
38
TCSD CPU Start-up Time
5
—
10
s
39
TIOBST Time for HF-INTOSC to Stabilize
—
0.25
1
ms
Note 1: Minimum pulse width that will consistently trigger a reset or interrupt. Shorter pulses may intermittently trigger a response.
FIGURE 27-11: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T13CKI
40
41
42
45
46
47
48
TMR0 or
TMR1
Note: Refer to Figure 27-6 for load conditions.
 2010-2012 Microchip Technology Inc.
DS41412F-page 453