Datasheet

 2012 Microchip Technology Inc. Preliminary DS41652A-page 97
PIC16F527
TABLE 15-11: RESET, WATCHDOG TIMER AND DEVICE RESET TIMER
FIGURE 15-7: TIMER0 CLOCK TIMINGS
TABLE 15-12: TIMER0 CLOCK REQUIREMENT
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C  T
A  +85C (industrial)
-40C  T
A  +125C (extended)
Operating Voltage V
DD range is described in
Section 15.1 “DC Characteristics: PIC16F527 (Industrial)”
Param
No.
Sym. Characteristic Min. Typ.
(1)
Max. Units Conditions
30 T
MCLMCLR Pulse Width (low) 2000* — — ns VDD = 5.0V
31 T
WDT Watchdog Timer Time-out
Period (no prescaler)
9*
9*
18*
18*
30*
40*
ms
ms
VDD = 5.0V (Industrial)
V
DD = 5.0V (Extended)
32 TDRT Device Reset Timer Period
Standard 9*
9*
18*
18*
30*
40*
ms
ms
V
DD = 5.0V (Industrial)
V
DD = 5.0V (Extended)
34 T
IOZ I/O High-impedance from MCLR
low
— — 2000* ns
* 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.
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40C  T
A  +85C (industrial)
-40C  T
A  +125C (extended)
Operating Voltage V
DD range is described in
Section 15.1 “DC Characteristics: PIC16F527 (Industrial)”
Param
No.
Sym. Characteristic Min. Typ.
(1)
Max. Units Conditions
40 Tt0H T0CKI High Pulse
Width
No Prescaler 0.5 T
CY + 20* — — ns
With Prescaler 10* — — ns
41 Tt0L T0CKI Low Pulse
Width
No Prescaler 0.5 TCY + 20* — — ns
With Prescaler 10* — — ns
42 Tt0P T0CKI Period 20 or T
CY + 40* N — — ns Whichever is greater.
N = Prescale Value
(1, 2, 4,..., 256)
* 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.
T0CKI
40 41
42