Microchip Technology AC160214 Data Sheet
PIC16(L)F1946/47
DS41414D-page 408
2010-2012 Microchip Technology Inc.
TABLE 30-5:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET PARAMETERS
AND BROWN-OUT RESET PARAMETERS
FIGURE 30-10:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C
Operating Temperature -40°C
T
A
+125°C
Param
No.
Sym.
Characteristic
Min.
Typ† Max. Units
Conditions
30
T
MC
L
MCLR Pulse Width (low)
2
—
—
s
31
T
WDTLP
Watchdog Timer Time-out Period
10
16
27
ms
V
DD
= 3.3V-5V,
1:16 Prescaler used
32
T
OST
Oscillator Start-up Timer Period
(1)
—
1024
—
Tosc
33*
T
PWRT
Power-up Timer Period, PWRTE = 0
40
65
140
ms
34*
T
IOZ
I/O high-impedance from MCLR Low
or Watchdog Timer Reset
or Watchdog Timer Reset
—
—
2.0
s
35
V
BOR
Brown-out Reset Voltage
(2)
2.55
1.80
1.80
2.70
1.90
1.90
2.85
2.11
V
V
V
BORV = 0
BORV = 1
BORV = 1
36*
V
HYST
Brown-out Reset Hysteresis
0
25
50
mV
-40°C to +85°C
37*
T
BORDC
Brown-out Reset DC Response
Time
Time
1
3
35
s
V
DD
V
BOR
*
These parameters are characterized but not tested.
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
Note 1:
By design, the Oscillator Start-up Timer (OST) counts the first 1024 cycles, independent of frequency.
2:
To ensure these voltage tolerances, V
DD
and V
SS
must be capacitively decoupled as close to the device as
possible. 0.1
F and 0.01 F values in parallel are recommended.
T0CKI
T1CKI
40
41
42
45
46
47
49
TMR0 or
TMR1
TMR1