PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 283

• Manufacturer Part Number: PIC18F1230
• Description: 18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 22-8:
FIGURE 22-9:
TABLE 22-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
© 2006 Microchip Technology Inc.
30
31
32
33
34
35
36
37
38
39
Param.
No.
Note:
Watchdog
Oscillator
Time-out
Time-out
I/O pins
Internal
Internal
PWRT
MCLR
Reset
Reset
Timer
Reference Voltage
Internal Reference
POR
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 22-5 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
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
Advance Information
36
BV
1024 T
DD
55.6
Min
200
200
3.4
—
—
—
—
2
OSC
34
65.5
30
Typ
4.0
20
10
—
—
—
—
2
1
PIC18F1230/1330
1024 T
35
Max
4.6
—
75
—
—
50
—
—
—
OSC
31
Units
ms
ms
—
s
s
s
s
s
s
s
T
V
V
OSC
DD
DD
DS39758B-page 281
34
= OSC1 period
Conditions
B
V
VDD
LVD
(see D005)