PIC16C5X
PIC16C54/55/56/57
FIGURE 11-4: RESET, WATCHDOG TIMER, AND
DEVICE RESET TIMER TIMING - PIC16C54/55/56/57
VDD
MCLR
30
Internal
POR
32
32
32
DRT
Time-out
Internal
RESET
Watchdog
Timer
RESET
31
34
34
I/O pin
(Note 1)
Note 1: I/O pins must be taken out of hi-impedance mode by enabling the output drivers in software.
TABLE 11-5: RESET, WATCHDOG TIMER, AND DEVICE RESET TIMER - PIC16C54/55/56/57
AC Characteristics Standard Operating Conditions (unless otherwise specified)
Operating Temperature
0°C ≤ TA ≤ +70°C (commercial)
–40°C ≤ TA ≤ +85°C (industrial)
–40°C ≤ TA ≤ +125°C (extended)
Operating Voltage VDD range is described in Section 11.1, Section 11.2 and Section 11.3
Parameter
No.
(1)
Sym Characteristic
Min Typ
Max Units
Conditions
30
31
TmcL MCLR Pulse Width (low)
100*
9*
—
—
ns VDD = 5.0V
Twdt Watchdog Timer Time-out Period
(No Prescaler)
18*
30*
ms VDD = 5.0V (Commercial)
32
34
TDRT Device Reset Timer Period
9*
—
18*
—
30*
ms VDD = 5.0V (Commercial)
ns
TioZ I/O Hi-impedance from MCLR Low
100*
*
These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5.0V, 25°C unless otherwise stated. These parameters are for design
guidance only and are not tested.
DS30453B-page 78
Preliminary
1998 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
