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PIC18F86J90-I Datasheet, PDF (414/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology | |||
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PIC18F87J90 FAMILY
FIGURE 28-7:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T13CKI
40
41
42
45
46
47
48
TMR0 or
TMR1
Note: Refer to Figure 28-3 for load conditions.
TABLE 28-12: 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
â
ns
With prescaler
10
â
ns
41
TT0L
T0CKI Low Pulse Width
No prescaler 0.5 TCY + 20
â
ns
With prescaler
10
â
ns
42
TT0P
T0CKI Period
No prescaler
TCY + 10
â
ns
With prescaler Greater of:
â
ns N = prescale
20 ns or
value
(TCY + 40)/N
(1, 2, 4,..., 256)
45
TT1H
T13CKI High Synchronous, no prescaler
0.5 TCY + 20
â
ns
Time
Synchronous, with prescaler
10
â
ns
Asynchronous
30
â
ns
46
TT1L
T13CKI Low Synchronous, no prescaler
Time
Synchronous, with prescaler
0.5 TCY + 5
10
â
ns
â
ns
Asynchronous
30
â
ns
47
TT1P
T13CKI Input Synchronous
Period
Greater of:
â
ns N = prescale
20 ns or
value
(TCY + 40)/N
(1, 2, 4, 8)
Asynchronous
60
â
ns
FT1
T13CKI Oscillator Input Frequency Range
DC
50 kHz
48
TCKE2TMRI Delay from External T13CKI Clock Edge to
Timer Increment
2 TOSC
7 TOSC â
DS39933D-page 414
ï£ 2010 Microchip Technology Inc.
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