PIC16F526 Datasheet, PDF (94/122 Pages) Microchip Technology – 14-Pin, 8-Bit Flash Microcontroller

PIC16F526
FIGURE 14-6:
RESET, WATCHDOG TIMER AND DEVICE RESET TIMER TIMING
VDD
MCLR
Internal
POR
32
DRT
Time-out⁽²⁾
Internal
Reset
Watchdog
Timer
Reset
I/O pin⁽¹⁾
30
32
32
31
34
34
Note 1: I/O pins must be taken out of High-Impedance mode by enabling the output drivers in software.
2: Runs in MCLR or WDT Reset only in XT, LP and HS modes.
TABLE 14-9: RESET, WATCHDOG TIMER AND DEVICE RESET TIMER
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C  TA  +85C (industrial)
-40C  TA  +125C (extended)
Operating Voltage VDD range is described in
Section 14.1 “DC Characteristics: PIC16F526 (Industrial)”
Param
No.
Sym.
Characteristic
Min. Typ.⁽¹⁾ Max. Units
Conditions
30
TMCL MCLR Pulse Width (low)
2000* —
—
ns VDD = 5.0V
31
TWDT Watchdog Timer Time-out Period 9*
18* 30* ms VDD = 5.0V (Industrial)
(no prescaler)
9*
18* 40* ms VDD = 5.0V (Extended)
32
TDRT Device Reset Timer Period
Standard
9*
18* 30* ms VDD = 5.0V (Industrial)
9*
18* 40* ms VDD = 5.0V (Extended)
Short
0.5* 1.125* 2*
0.5* 1.125* 2.5*
ms VDD = 5.0V (Industrial)
ms VDD = 5.0V (Extended)
34
TIOZ I/O High-impedance from MCLR —
— 2000* ns
low
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at 5V, 25C unless otherwise stated. These parameters are for design
guidance only and are not tested.
DS41326D-page 94
 2010 Microchip Technology Inc.