PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 352

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F4321 FAMILY
FIGURE 26-8:
FIGURE 26-9:
TABLE 26-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
DS39689E-page 350
30
31
32
33
34
35
36
37
38
39
Param.
No.
Note:
Watchdog
Time-out
Time-out
I/O pins
Internal
Internal
PWRT
MCLR
Reset
Reset
Timer
Reference Voltage
Internal Reference
POR
OSC
Symbol
TmcL
T
T
T
T
T
T
T
T
T
V
OST
CSD
WDT
IOZ
IRVST
IOBST
PWRT
BOR
LVD
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
Preliminary
36
BV
1024 T
DD
3.56
Min
200
200
57
—
—
—
—
2
OSC
34
4.19
30
Typ
67
20
10
—
—
—
—
2
1
1024 T
35
Max
4.82
77
50
—
—
—
—
—
—
OSC
31
© 2007 Microchip Technology Inc.
Units
ms
ms
μs
μs
μs
μs
μs
μs
μs
—
T
V
V
OSC
DD
DD
34
≤ B
≤ V
= OSC1 period
Conditions
VDD
LVD
(see D005)