PIC17C7XX_13 Datasheet, PDF (251/306 Pages) Microchip Technology – High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
FIGURE 20-8:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP
TIMER, AND BROWN-OUT RESET TIMING
VDD
MCLR
Internal
POR/BOR
33
PWRT
Time-out
OSC ³²
Time-out
Internal
Reset
Watchdog
Timer
Reset
Address/
Data
30
31
35
TABLE 20-3: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER, POWER-UP TIMER,
AND BROWN-OUT RESET REQUIREMENTS
Param.
No.
Sym
Characteristic
Min
30
TmcL MCLR Pulse Width (low)
100
31
TWDT Watchdog Timer Time-out Period
5
(Postscale = 1)
32
TOST Oscillation Start-up Timer Period
—
33
TPWRT Power-up Timer Period
40
34
TIOZ MCLR to I/O hi-impedance
100
35
TmcL2adI MCLR to System
PIC17C7XX
—
Interface bus
PIC17LC7XX
—
(AD15:AD0>) invalid
36
TBOR Brown-out Reset Pulse Width (low)
100
†
Data in “Typ” column is at 5V, 25C unless otherwise stated.
Typ†
—
12
1024TOSC
96
—
—
—
—
Max Units
Conditions
—
ns VDD = 5V
25
ms VDD = 5V
—
ms TOSC = OSC1 period
200 ms VDD = 5V
—
ns Depends on pin load
100 ns
120 ns
—
ns VDD within VBOR limits
(parameter D005)
.
 1998-2013 Microchip Technology Inc.
DS30289C-page 251