PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 341
PIC18F258
Manufacturer Part Number
PIC18F258
Description
High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F258.pdf
(384 pages)
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FIGURE 27-7:
FIGURE 27-8:
TABLE 27-9:
30
31
32
33
34
35
36
37
Param
Internal Reference Voltage stable
Enable Internal Reference Voltage
2002 Microchip Technology Inc.
No.
Watchdog
Note: Refer to Figure 27-4 for load conditions.
Time-out
Time-out
I/O Pins
Internal
Internal
PWRT
MCLR
Reset
Reset
Timer
POR
OSC
V
TmcL
T
T
T
T
T
T
T
V
Symbol
OST
DD
V
WDT
IOZ
IVRST
PWRT
BOR
LVD
IRVST
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 Hi-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
Preliminary
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
DD
DD
= OSC1 period
Conditions
34
DS41159B-page 339
BV
V
LVD
DD
V
(see D420)
(see D005)
BGAP
= 1.2V
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