PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 256

• Manufacturer Part Number: PIC18C242
• Description: High-Performance Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX2
FIGURE 21-7: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
FIGURE 21-8: BROWN-OUT RESET TIMING
TABLE 21-7:
DS39026B-page 256
30
31
32
33
34
35
36
Param.
Internal Reference Voltage stable
Enable Internal Reference Voltage
Watchdog
No.
Time-out
Time-out
I/O Pins
Internal
Internal
PWRT
MCLR
Reset
Reset
Timer
POR
OSC
V
V
Note: Refer to Figure 21-4 for load conditions.
DD
V
IRVST
TmcL
T
T
T
T
T
T
Symbol
DD
WDT
OST
PWRT
IOZ
BOR
IVRST
TIMER TIMING
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(No Prescaler)
Oscillation Start-up Timer Period
Power up Timer Period
I/O Hi-impedance from MCLR Low
or Watchdog Timer Reset
Brown-out Reset Pulse Width
Time for Internal Reference
Voltage to become stable
33
Characteristic
32
36
BV
Preliminary
DD
1024T
Min
200
28
—
—
2
7
OSC
34
30
Typ
18
72
20
—
—
—
2
35
1024T
Max
132
—
33
—
—
50
OSC
31
Units
ms
ms
—
7/99 Microchip Technology Inc.
s
s
s
s
T
V
D005)
OSC
DD
34
Conditions
= OSC1 period
B
VDD
V
BGAP
(See
= 1.2V