PIC16HV540 Datasheet, PDF (26/36 Pages) Microchip Technology – Enhanced PIC16C54 EPROM-Based 8-Bit CMOS Microcontroller With On-Chip Voltage Regulator

PIC16HV540
FIGURE 7-4: RESET, WATCHDOG TIMER, AND
DEVICE RESET TIMER TIMING - PIC16HV540
VDD
MCLR
Internal
POR
32
DRT
Time-out
30
32
32
Internal
RESET
Watchdog
Timer
RESET
I/O pin
(Note 1)
31
34
34
Note 1: I/O pins must be taken out of hi-impedance mode by enabling the output drivers in software.
TABLE 7-3: RESET, WATCHDOG TIMER, AND DEVICE RESET TIMER - PIC16HV540
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
30
TmcL MCLR Pulse Width (low)
—
2
— µs VDD = 15V, VIO = 5V
31
Twdt Watchdog Timer Time-out Period 9.0* 18* 40* ms VDD = 15V, VIO = 5V
32
TDRT Device Reset Timer Period
9.0* 18* 30*
0.55* 1.1* 2.5
ms VDD = 15V, VIO = 5V,
RC mode
34
TioZ I/O Hi-impedance from MCLR Low — — 100* ns
—
Tpc Pin Change Pulse Width
—
2
— µs
* These parameters are characterized but not tested.
Note 1: Data in the Typical (“Typ”) column is at VIO = 5V, VDD = 9V, 25°C unless otherwise stated. These parameters
are for design guidance only and are not tested.
DS40197A-page 26
Preliminary
© 1998 Microchip Technology Inc.