PIC16F882-I Datasheet, PDF (262/328 Pages) Microchip Technology – 28/40/44-Pin, Enhanced Flash-Based 8-Bit CMOS Microcontrollers

PIC16F882/883/884/886/887
FIGURE 17-8:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
TMR0 or
TMR1
45
46
47
49
TABLE 17-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature
-40°C ≤ TA ≤ +125°C
Param
No.
Sym.
Characteristic
Min.
Typ† Max. Units Conditions
40* TT0H
T0CKI High Pulse Width No Prescaler 0.5 TCY + 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
Greater of: —
—
ns N = prescale value
20 or TCY + 40
(2, 4, ..., 256)
N
45* TT1H
T1CKI High Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Time
Synchronous,
15
—
—
ns
with Prescaler
Asynchronous
30
—
—
ns
46* TT1L
T1CKI Low Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Time
Synchronous,
15
—
—
ns
with Prescaler
Asynchronous
30
—
—
ns
47* TT1P
T1CKI Input Synchronous
Period
Greater of: —
—
ns N = prescale value
30 or TCY + 40
(1, 2, 4, 8)
N
Asynchronous
60
—
—
ns
48
FT1
Timer1 Oscillator Input Frequency Range
(oscillator enabled by setting bit T1OSCEN)
—
32.768 — kHz
49* TCKEZTMR1 Delay from External Clock Edge to Timer
Increment
2 TOSC
— 7 TOSC — Timers in Sync
mode
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
DS41291F-page 260
© 2009 Microchip Technology Inc.