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2011-2015 Microchip Technology Inc.
DS40001609E-page 327
PIC16(L)F1508/9
FIGURE 29-10:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 29-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
(unless otherwise stated)
Param.
No.
Sym.
Characteristic
Min.
Typ†
Max.
Units
Conditions
40*
T
T
0H
T0CKI High Pulse Width
No Prescaler
0.5 T
CY
+ 20
—
—
ns
With Prescaler
10
—
—
ns
41*
T
T
0L
T0CKI Low Pulse Width
No Prescaler
0.5 T
CY
+ 20
—
—
ns
With Prescaler
10
—
—
ns
42*
T
T
0P
T0CKI Period
Greater of:
20 or T
CY
+ 40
N
—
—
ns
N = prescale value
45*
T
T
1H
T1CKI High
Time
Synchronous, No Prescaler
0.5 T
CY
+ 20
—
—
ns
Synchronous, with Prescaler
15
—
—
ns
Asynchronous
30
—
—
ns
46*
T
T
1L
T1CKI Low
Time
Synchronous, No Prescaler
0.5 T
CY
+ 20
—
—
ns
Synchronous, with Prescaler
15
—
—
ns
Asynchronous
30
—
—
ns
47*
T
T
1P
T1CKI Input
Period
Synchronous
Greater of:
30 or T
CY
+ 40
N
—
—
ns
N = prescale value
Asynchronous
60
—
—
ns
48
F
T
1
Secondary Oscillator Input Frequency Range
(Oscillator enabled by setting bit T1OSCEN)
32.4
32.768
33.1
kHz
49*
TCKEZ
TMR
1 Delay from External Clock Edge to Timer
Increment
2 T
OSC
—
7 T
OSC
—
Timers in Sync
mode
*
These parameters are characterized but not tested.
†
Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
T0CKI
T1CKI
40
41
42
45
46
47
49
TMR0 or
TMR1
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