PIC18F47J53 Datasheet, PDF (537/586 Pages) Microchip Technology – 28/44-Pin, High-Performance USB Microcontrollers with nanoWatt XLP Technology

PIC18F47J53 FAMILY
FIGURE 31-7:
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 31-4 for load conditions.
30
31
34
34
TABLE 31-14: 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)
2.67 4.0 5.53
ms
32
TOST Oscillator Start-up Timer Period
1024 TOSC — 1024 TOSC — TOSC = OSC1 period
33
TPWRT Power-up Timer Period
—
1.0
—
ms
34
TIOZ I/O High-Impedance from MCLR
Low or Watchdog Timer Reset
—
— 3 TCY + 2 s (Note 1)
36
TIRVST Time for Internal Reference
Voltage to become Stable
—
20
—
s
37
TLVD High/Low-Voltage Detect
Pulse Width
—
200
—
s
38
TCSD CPU Start-up Time
—
200
—
s (Note 2)
Note 1: The maximum TIOZ is the lesser of (3 TCY + 2 s) or 700 s.
2: MCLR rising edge to code execution, assuming TPWRT (and TOST if applicable) has already expired.
 2010 Microchip Technology Inc.
Preliminary
DS39964B-page 537