PIC16F88

Manufacturer Part NumberPIC16F88
ManufacturerMicrochip Technology Inc.
PIC16F88 datasheet
 
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Page 183/228

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FIGURE 18-6:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
V
DD
MCLR
Internal
POR
33
PWRT
Time-out
32
Oscillator
Time-out
Internal
Reset
Watchdog
Timer
Reset
I/O Pins
Note: Refer to Figure 18-3 for load conditions.
FIGURE 18-7:
BROWN-OUT RESET TIMING
V
DD
TABLE 18-5:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET REQUIREMENTS
Parameter
Sym
Characteristic
No.
30
TmcL
MCLR Pulse Width (Low)
31*
T
Watchdog Timer Time-out Period
WDT
(16-bit prescaler = 0100 and no
postscaler)
32
T
Oscillation Start-up Timer Period
OST
33*
T
Power-up Timer Period
PWRT
34
T
I/O High-impedance from MCLR
IOZ
Low or Watchdog Timer Reset
35
T
Brown-out Reset Pulse Width
BOR
*
These parameters are characterized but not tested.
Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
 2005 Microchip Technology Inc.
PIC16F87/88
30
31
34
V
BOR
35
Min
Typ†
Max
Units
2
s
V
= 5V, -40°C to +85°C
DD
13.6
16
18.4
ms
V
= 5V, -40°C to +85°C
DD
1024 T
T
OSC
OSC
61.2
72
82.8
ms
V
= 5V, -40°C to +85°C
DD
2.1
s
100
s
V
DD
34
Conditions
= OSC1 period
V
(D005)
BOR
DS30487C-page 181