Datasheet

PIC16C77X
 1999-2013 Microchip Technology Inc. Advance Information DS30275B-page 163
FIGURE 15-6: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER TIMING
FIGURE 15-7: BROWN-OUT RESET TIMING
TABLE 15-7 RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER,POWER-UP TIMER,
AND BROWN-OUT RESET REQUIREMENTS
Parameter
No.
Sym Characteristic Min Typ† Max Units Conditions
30* TmcL MCLR
Pulse Width (low) 100 — — ns VDD = 5V, -40°C to +85°C
31* Twdt Watchdog Timer Time-out Period
(No Prescaler)
71833msV
DD = 5V, -40°C to +85°C
32* Tost Oscillation Start-up Timer Period — 1024T
OSC ——TOSC = OSC1 period
33* Tpwrt Power up Timer Period 28 72 132 ms V
DD = 5V, -40°C to +85°C
34* T
IOZ I/O Hi-impedance from MCLR Low
or Watchdog Timer Reset
——100ns
35* T
BOR Brown-out Reset pulse width 100 — — sVDD  VBOR (D005)
* 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.
VDD
MCLR
Internal
POR
PWRT
Time-out
OSC
Time-out
Internal
RESET
Watchdog
Timer
RESET
33
32
30
31
34
I/O Pins
34
Note: Refer to Figure 15-3 for load conditions.
VDD
BVDD
35
774.book Page 163 Tuesday, January 29, 2013 12:02 PM