PIC16F1847_13 Datasheet, PDF (363/440 Pages) Microchip Technology – 18/20/28-Pin Flash Microcontrollers with XLP Technology

PIC16(L)F1847
TABLE 30-5: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C TA +125°C
Param.
No.
Sym.
Characteristic
Min. Typ† Max. Units
Conditions
30
TMCL MCLR Pulse Width (low)
2 — — s
31
TWDTLP Low-Power Watchdog Timer
Time-out Period
12 16 20 ms VDD = 3.3V-5V,
1:16 Prescaler used
32
TOST Oscillator Start-up Timer Period
(Note 1)
— 1024 — Tosc
33* TPWRT Power-up Timer Period, PWRTE = 0 58 74 92 ms
34* TIOZ I/O high-impedance from MCLR Low — — 2.0 s
or Watchdog Timer Reset
35
VBOR Brown-out Reset Voltage (Note 2) 2.55 2.70 2.85 V BORV= 0
1.80 1.9 2.05
BORV= 1
36* VHYST Brown-out Reset Hysteresis
20 52 85 mV BORV= 0, -40°C to +85°C
12 38 65 mV BORV= 1, -40°C to +85°C
37* TBORDC Brown-out Reset DC Response
Time
1
3
35 s VDD  VBOR
* 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, VDD and VSS must be capacitively decoupled as close to the device as
possible. 0.1 F values in parallel are recommended.
FIGURE 30-10: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
TMR0 or
TMR1
45
46
47
49
 2011-2013 Microchip Technology Inc.
Preliminary
DS40001453D-page 363