Datasheet

PIC16F785/HV785
DS41249E-page 154 © 2008 Microchip Technology Inc.
FIGURE 19-6: BROWN-OUT RESET TIMING AND CHARACTERISTICS
TABLE 19-4: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER
AND BROWN-OUT RESET REQUIREMENTS
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
30 T
MCLMCLR Pulse Width (low) 2
11
—
18
—
24
μs
μs
VDD = 5.0V, -40°C to +85°C
Extended temperature
31 T
WDT Watchdog Timer Time-out Period
(No Prescaler)
10
10
17
17
25
30
ms
ms
VDD = 5.0V, -40°C to +85°C
Extended temperature
32 T
OST Oscillation Start-up Timer Period — 1024 TOSC ——TOSC = OSC1 period
33* TPWRT Power-up Timer Period 28* 64 132* ms VDD = 5.0V, -40°C to +85°C
34 T
IOZ I/O High-impedance from MCLR
Low or Watchdog Timer Reset
——2.0μs
35 V
BOR Brown-out Reset Voltage 2.025 — 2.175 V
36 T
BOR Brown-out Reset Pulse Width 100* — — μsVDD ≤ VBOR (D005)
* These parameters are characterized but not tested.
† Data in ‘Typ’ column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
VBOR
Reset (due to BOR)
V
DD
(Device in Brown-out Reset)
(Device not in Brown-out Reset)
64 ms time-out
(1)
36
Note 1: 64 ms delay only if PWRTE bit in Configuration Word is programmed to ‘0’.