Datasheet

PIC12F510/16F506
DS41268D-page 94 © 2007 Microchip Technology Inc.
TABLE 13-7: RESET, WATCHDOG TIMER AND DEVICE RESET TIMER
FIGURE 13-9: TIMER0 CLOCK TIMINGS
TABLE 13-8: TIMER0 CLOCK REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C (industrial)
-40°C ≤ T
A ≤ +125°C (extended)
Param
No.
Sym Characteristic Min Typ
(1)
Max Units Conditions
30 T
MCLMCLR Pulse Width (low) 2000* — — ns VDD = 5.0V
31 TWDT 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 T
DRT Device Reset Timer Period
Standard 9*
9*
18*
18*
30*
40*
ms
ms
VDD = 5.0V (Industrial)
V
DD = 5.0V (Extended)
Short 0.5*
0.5*
1.125*
1.125*
2*
2.5*
ms
ms
V
DD = 5.0V (Industrial)
V
DD = 5.0V (Extended)
34 TIOZ 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 ≤ TA ≤ +85°C (industrial)
-40°C ≤ T
A ≤ +125°C (extended)
Parm
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 T
CY + 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