
2011 Microchip Technology Inc.
Preliminary
DS41458B-page 321
PIC16(L)F1526/27
FIGURE 25-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 25-5:
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:
20 or TCY + 40
N
—
ns
N = prescale value
(2, 4, ..., 256)
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:
30 or TCY + 40
N
—
ns
N = prescale value
(1, 2, 4, 8)
Asynchronous
60
—
ns
48
FT1
Secondary Oscillator Input Frequency Range
(oscillator enabled by setting bit SOSCEN)
32.4
32.768
33.1
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 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