PIC18F248-E/L MICROCHIP [Microchip Technology], PIC18F248-E/L Datasheet - Page 347

• Manufacturer Part Number: PIC18F248-E/L
• Description: 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 27-8:
FIGURE 27-9:
TABLE 27-9:
© 2006 Microchip Technology Inc.
30
31
32
33
34
35
36
37
Param
No.
Reference Voltage
Internal Reference
Watchdog
Note: Refer to Figure 27-5 for load conditions.
Oscillator
Time-out
Time-out
I/O Pins
Internal
Internal
Enable Internal
PWRT
MCLR
Voltage Stable
Reset
Reset
Timer
POR
V
TmcL
T
T
T
T
T
T
T
Symbol
OST
DD
WDT
IOZ
IRVST
PWRT
BOR
LVD
V
IRVST
V
DD
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,
BROWN-OUT RESET AND LOW-VOLTAGE DETECT REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(no prescaler)
Oscillation Start-up Timer Period
Power-up Timer Period
I/O High-Impedance from MCLR Low
or Watchdog Timer Reset
Brown-out Reset Pulse Width
Time for Internal Reference
Voltage to become stable
Low-Voltage Detect Pulse Width
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
BROWN-OUT RESET AND LOW-VOLTAGE DETECT TIMING
33
Characteristic
32
36
BV
V
LVD
DD
1024 T
(for 37)
(for 35)
Min
200
200
28
—
—
2
7
OSC
34
Typ
18
72
20
—
—
—
—
2
30
35, 37
1024 T
Max
132
33
50
—
—
—
—
OSC
Units
ms
ms
—
31
s
s
s
s
s
PIC18FXX8
T
For V
For V
OSC
= OSC1 period
DD
DD
Conditions
DS41159E-page 345
34
BV
V
LVD
DD
V
BGAP
(see D420)
(see D005)
= 1.2V