PIC18F67J11-IPT Datasheet, PDF (407/448 Pages) Microchip Technology – 64/80-Pin High-Performance, 1-Mbit Flash Microcontrollers with nanoWatt Technology

PIC18F87J11 FAMILY
FIGURE 27-8:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
VDD
MCLR
Internal
POR
PWRT
Time-out
Oscillator
Time-out
Internal
Reset
Watchdog
Timer
Reset
33
32
I/O pins
Note: Refer to Figure 27-3 for load conditions.
30
31
34
34
TABLE 27-12: 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
—
—
TCY
31
TWDT Watchdog Timer Time-out Period
(no postscaler)
3.4
4.0
4.6
ms
32
TOST Oscillator Start-up Timer Period
1024 TOSC — 1024 TOSC —
33
TPWRT Power-up Timer Period
45.8 65.5 85.2
ms
34
TIOZ I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
—
2
—
μs
38
TCSD CPU Start-up Time
—
200
—
μs
Note 1: To ensure device reset, MCLR must be low for at least 2 TCY or 400 µs, whichever is lower.
(Note 1)
TOSC = OSC1 period
© 2009 Microchip Technology Inc.
DS39778D-page 407