PIC18F2420-I/SOC01 Microchip, PIC18F2420-I/SOC01 Datasheet - Page 347
![no-image](/images/no-image-200.jpg)
PIC18F2420-I/SOC01
Manufacturer Part Number
PIC18F2420-I/SOC01
Description
28 pin, 16 kb flash, 3804 ram, 25 i/o...
Manufacturer
Microchip
Datasheet
1.PIC18F2420-ISOC01.pdf
(412 pages)
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FIGURE 26-8:
FIGURE 26-9:
TABLE 26-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
© 2008 Microchip Technology Inc.
Param.
30
31
32
33
34
35
36
37
38
39
No.
Watchdog
Note:
Time-out
Time-out
I/O pins
Internal
Internal
PWRT
MCLR
Reset
Timer
Reset
Internal Reference
Reference Voltage
TmcL
T
T
T
T
T
T
T
T
T
POR
OSC
Symbol
V
OST
CSD
WDT
PWRT
IOZ
BOR
IRVST
LVD
IOBST
DD
Enable Internal
Voltage Stable
Refer to Figure 26-5 for load conditions.
AND BROWN-OUT RESET REQUIREMENTS
MCLR Pulse Width (low)
Watchdog Timer Time-out Period
(no postscaler)
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
High/Low-Voltage Detect Pulse Width
CPU Start-up Time
Time for INTOSC to Stabilize
V
IRVST
V
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
BROWN-OUT RESET TIMING
DD
33
Characteristic
32
PIC18F2420/2520/4420/4520
36
BV
1024 T
DD
55.6
Min
200
200
3.4
—
—
—
—
2
OSC
34
65.5
30
Typ
4.1
20
10
—
—
—
—
2
1
1024 T
35
Max
4.71
75.4
50
—
—
—
—
—
—
OSC
31
Units
ms
ms
μs
—
μs
μs
μs
μs
μs
μs
T
V
V
OSC
DD
DD
DS39631E-page 345
34
≤ B
≤ V
= OSC1 period
Conditions
VDD
LVD
(see D005)
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