PIC16F627A_05 Datasheet, PDF (149/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
FIGURE 17-7:
BROWN-OUT RESET TIMING
VDD
VBOR
35
TABLE 17-7: RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER REQUIREMENTS
Parameter
No.
Sym
Characteristic
Min Typ† Max Units
Conditions
30
31
32
33
34
35
Legend:
*
†
TMCL MCLR Pulse Width (low)
2000
—
—
ns VDD = 5V, -40°C to +85°C
TWDT Watchdog Timer Time out Period
7*
(No Prescaler)
18
33* ms VDD = 5V, -40°C to +85°C
TOST Oscillation Start-up Timer Period
— 1024 TOSC —
— TOSC = OSC1 period
TPWRT Power-up Timer Period
28*
72
132* ms VDD = 5V, -40°C to +85°C
TIOZ I/O High-impedance from MCLR
—
Low or Watchdog Timer Reset
—
2.0* μs
TBOR Brown-out Reset pulse width
100*
—
—
μs VDD ≤ VBOR (D005)
TBD = To Be Determined.
These parameters are characterized but not tested.
Data in “Typ” column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
FIGURE 17-8:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
RA4/T0CKI/CMP2
40
41
42
RB6/T1OSO/T1CKI/PGC
TMR0 OR
TMR1
45
46
47
48
© 2005 Microchip Technology Inc.
DS40044D-page 147