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PIC16(L)F1508/9
DS40001609E-page 326
2011-2015 Microchip Technology Inc.
TABLE 29-10: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET PARAMETERS
FIGURE 29-9:
BROWN-OUT RESET TIMING AND CHARACTERISTICS
(unless otherwise stated)
Param.
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
30
T
MC
L
MCLR Pulse Width (low)
2
—
—
s
31
T
WDTLP
Low-Power 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
—
T
OSC
33*
T
PWRT
Power-up Timer Period
40
65
140
ms
PWRTE =
0
34*
T
IOZ
I/O high-impedance from MCLR Low
or Watchdog Timer Reset
—
—
2.0
s
35
V
BOR
Brown-out Reset Voltage
(2)
2.55
2.35
1.80
2.70
2.45
1.90
2.85
2.58
2.05
V
V
V
BORV =
0
BORV =
1
(PIC16LF1508/9)
BORV =
1
(PIC16LF1508/9)
36*
V
HYST
Brown-out Reset Hysteresis
0
25
75
mV
-40°C
T
A
+85°C
37*
T
BORDC
Brown-out Reset DC Response Time
1
16
35
s
V
DD
V
BOR
38
V
LPBOR
Low-Power Brown-out Reset Voltage
1.8
2.1
2.5
V
LPBOR =
1
*
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.
V
BOR
V
DD
(Device in Brown-out Reset)
(Device not in Brown-out Reset)
33
Reset
(due to BOR)
V
BOR
and V
HYST
37
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