PIC16F737-I Datasheet, PDF (227/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC16F7X7
FIGURE 18-7:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND
POWER-UP TIMER TIMING
VDD
MCLR
Internal
POR
PWRT
Time-out
Oscillator
Time-out
Internal
Reset
Watchdog
Timer
Reset
I/O pins
33
32
30
31
34
34
Note: Refer to Figure 18-4 for load conditions.
FIGURE 18-8:
BROWN-OUT RESET TIMING
VDD
VBOR
35
TABLE 18-6: 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
TMCL MCLR Pulse Width (low)
2
—
—
µs VDD = 5V, -40°C to +85°C
31*
TWDT
Watchdog Timer Time-out Period
(no prescaler)
13.6
16
18.4 ms VDD = 5V, -40°C to +85°C
32
TOST
Oscillation Start-up Timer Period
— 1024 TOSC —
— TOSC = OSC1 period
33*
TPWRT Power-up Timer Period
61.2
72
82.8 ms VDD = 5V, -40°C to +85°C
34
TIOZ
I/O High-Impedance from MCLR Low or —
—
2.1
µs
Watchdog Timer Reset
35
TBOR Brown-out Reset Pulse Width
100
—
—
µs VDD ≤ 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.
 2004 Microchip Technology Inc.
DS30498C-page 225