PIC18F45J10 Datasheet, PDF (317/358 Pages) Microchip Technology – 28/40/44-Pin High-Performance RISC Microcontrollers with nanoWatt Technology

PIC18F45J10 FAMILY
FIGURE 23-8:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T1CKI
40
41
42
45
46
47
48
TMR0 or
TMR1
Note: Refer to Figure 23-3 for load conditions.
TABLE 23-11: 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 —
© 2007 Microchip Technology Inc.
Preliminary
DS39682C-page 315