PIC18F45K80-I Datasheet, PDF (568/622 Pages) Microchip Technology – 28/40/44/64-Pin, Enhanced Flash Microcontrollers with ECAN and nanoWatt XLP Technology

PIC18F66K80 FAMILY
FIGURE 31-9:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TxCKI
SOSCO/SCLKI
40
41
42
45
46
47
48
TMR0 or
TMR1
Note: Refer to Figure 31-3 for load conditions.
TABLE 31-13: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Symbol
Characteristic
Min
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
No prescaler
TCY + 10
—
ns
With prescaler Greater of:
—
ns N = prescale
20 ns or
value
(TCY + 40)/N
(1, 2, 4,..., 256)
45
TT1H
T1CKI High Synchronous, no prescaler
0.5 TCY + 20
—
ns
Time
Synchronous, with prescaler
10
—
ns
Asynchronous
30
—
ns
46
TT1L
T1CKI Low Synchronous, no prescaler
Time
Synchronous, with prescaler
0.5 TCY + 5
10
—
ns
—
ns
Asynchronous
30
—
ns
47
TT1P
T1CKI Input Synchronous
Period
Greater of:
—
ns N = prescale
20 ns or
value
(TCY + 40)/N
(1, 2, 4, 8)
Asynchronous
60
—
ns
FT1
T1CKI Oscillator Input Frequency Range
DC
50 kHz
48
TCKE2TMRI Delay from External T1CKI Clock Edge to
Timer Increment
2 TOSC
7 TOSC —
DS39977F-page 568
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