PIC18F6525_13 Datasheet, PDF (343/400 Pages) Microchip Technology – 64/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with A/D

PIC18F6525/6621/8525/8621
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)
7
18
33
ms
32
TOST Oscillation Start-up Timer Period
1024 TOSC — 1024 TOSC — TOSC = OSC1 period
33
TPWRT Power-up Timer Period
28
72
132
ms
34
TIOZ
I/O High-impedance from MCLR Low
—
2
—
s
or Watchdog Timer Reset
35
TBOR Brown-out Reset Pulse Width
200
—
—
s VDD  BVDD (see D005)
36
TIRVST Time for Internal Reference
Voltage to become stable
—
20
50
s
37
TLVD Low-Voltage Detect Pulse Width
200
—
—
s VDD  VLVD
FIGURE 27-11: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T13CKI
40
41
42
45
46
TMR0 or
TMR1
47
48
Note: Refer to Figure 27-4 for load conditions.
 2003-2013 Microchip Technology Inc.
DS39612C-page 343