PIC18F87K22 Datasheet, PDF (509/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
FIGURE 31-13: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1CKI
40
41
42
45
46
47
48
TMR0 or
TMR1
Note: Refer to Figure 31-3 for load conditions.
TABLE 31-14: 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 —
 2010 Microchip Technology Inc.
Preliminary
DS39960B-page 509