Datasheet

PIC16(L)F720/721
DS40001430E-page 200  2010-2013 Microchip Technology Inc.
TABLE 23-4: RESET, WATCHDOG TIME, POWER-UP TIMER, AND BROWN-OUT RESET
PARAMETERS
FIGURE 23-9: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C T
A +125°C
Param.
No.
Sym. Characteristic Min. Typ† Max. Units Conditions
30* TMCLMCLR Pulse Width (low) 2
5
—
—
—
—
s
s
VDD = 5V, -40°C to +85°C
V
DD = 5V
(1)
31 TWDT Standard Watchdog Timer Time-out
Period (No Prescaler)
(2)
10
10
18
18
27
33
ms
ms
VDD = 3.3V-5V, -40°C to +85°C
V
DD = 3.3V-5V
(1)
33* TPWRT Power-up Timer Period, PWRTE = 0 40 65 140 ms
34* TIOZ I/O high-impedance from MCLR Low
or Watchdog Timer Reset
——2.0s
35 V
BOR Brown-out Reset Voltage 1.80 1.9 2.1 V
36* VHYST Brown-out Reset Hysteresis 0 25 50 mV
37* TBORDC Brown-out Reset DC Response
Time
135
10
sVDD  VBOR, -40°C to +85°C
V
DD  VBOR
* 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.
Note 1: Voltages above 3.6V require that the regulator be enabled.
2: Design Target. If unable to meet this target, the maximum can be increased, but the minimum cannot be
changed.
T0CKI
T1CKI
40
41
42
45
46
47
49
TMR0 or
TMR1