PIC18F-LF1XK50 Datasheet, PDF (386/420 Pages) Microchip Technology – 20-Pin USB Flash Microcontrollers

PIC18F/LF1XK50
FIGURE 27-10: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
40
41
42
T1CKI
TMR0 or
TMR1
45
46
47
49
TABLE 27-6: 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
Synchro-
15
—
—
ns
nous, with
Prescaler
Asynchro-
nous
30
—
—
ns
46* TT1L
T1CKI Low Synchronous, No Prescaler 0.5 TCY + 20 —
—
ns
Time
Synchronous, with Prescaler
15
—
—
ns
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)
32.4
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 3V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
DS41350E-page 386
Preliminary
 2010 Microchip Technology Inc.