PIC16F676-I Datasheet, PDF (101/132 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers

PIC16F630/676
FIGURE 12-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
TMR0 or
TMR1
45
46
47
48
TABLE 12-5: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
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 Time Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Synchronous,
with Prescaler
15
—
—
ns
Asynchronous
30
—
—
ns
46* Tt1L
T1CKI Low Time Synchronous, No Prescaler
0.5 TCY + 20 —
—
ns
Synchronous,
with Prescaler
15
—
—
ns
Asynchronous
30
—
—
ns
47* Tt1P
T1CKI Input
Period
Synchronous
Greater of:
—
—
ns N = prescale value
30 or TCY + 40
(1, 2, 4, 8)
N
Asynchronous
60
—
—
ns
Ft1
Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
DC
— 200* kHz
48 TCKEZtmr1 Delay from external clock edge to timer increment
2 TOSC*
— 7 TOSC* —
* 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.
 2010 Microchip Technology Inc.
DS40039F-page 101