Datasheet

PIC16HV540
DS40197B-page 68 Preliminary  2000 Microchip Technology Inc.
TABLE 10-3: RESET, WATCHDOG TIMER, AND DEVICE RESET TIMER - PIC16HV540
FIGURE 10-6: TIMER0 CLOCK TIMINGS - PIC16HV540
TABLE 10-4: TIMER0 CLOCK REQUIREMENTS - PIC16HV540
AC Characteristics Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C ≤ T
A ≤ +70°C (commercial)
–40°C ≤ T
A ≤ +85°C (industrial)
Parameter
No. Sym Characteristic Min. Typ.
(1)
Max. Units Conditions
30 TmcL MCLR
Pulse Width (low) 2 ——µs VDD = 15V, VREG = 5V
31
Twdt Watchdog Timer Time-out Period 9.0* 18* 40* ms V
DD = 15V, VREG = 5V
32
T
DRT Device Reset Timer Period 9.0*
0.55*
18*
1.1*
30*
2.5*
ms VDD = 15V, VREG = 5V,
RC mode
34
Tio
Z I/O Hi-impedance from MCLR Low ——100* ns
—
Tpc Pin Change Pulse Width 2 ——µs
35
T
BOD Brown-out Detect Pulse Width — 2 — µs VREG ≤ BVDD
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ ”) column is at V
REG = 5V, VDD = 15V, 25°C unless otherwise stated. These param-
eters are for design guidance only and are not tested.
AC Characteristics Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C
≤ TA ≤ +70°C (commercial)
–40°C
≤ TA ≤ +85°C (industrial)
Parameter
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 (“Ty p ”) column is at 3.8V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
T0CKI
40 41
42