PIC18F6X2X Datasheet, PDF (346/386 Pages) Microchip Technology – 64/80-Pin High Performance, 64-Kbyte Enhanced FLASH Microcontrollers with A/D

PIC18F6X2X/8X2X
FIGURE 27-11: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
T0CKI
T1OSO/T13CKI
40
41
42
45
46
TMR0 or
TMR1
47
48
Note: Refer to Figure 27-4 for load conditions.
TABLE 27-12: 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
—
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:
—
20 ns or TCY + 40
N
ns N = prescale
value
(1, 2, 4,..., 256)
45
Tt1H
T13CKI Synchronous, no prescaler
0.5 TCY + 20
High Time _{Synchronous, PIC18F6X2X/8X2X}
10
with prescaler _{PIC18LF6X2X/8X2X}
25
—
ns
—
ns
—
ns
Asynchronous PIC18F6X2X/8X2X
30
—
ns
PIC18LF6X2X/8X2X
50
—
ns
46
Tt1L
T13CKI Synchronous, no prescaler
0.5 TCY + 5
Low Time _{Synchronous, PIC18F6X2X/8X2X}
10
with prescaler _{PIC18LF6X2X/8X2X}
25
—
ns
—
ns
—
ns
Asynchronous PIC18F6X2X/8X2X
30
—
ns
PIC18LF6X2X/8X2X
TBD
TBD ns
47
Tt1P
T13CKI Synchronous
Input
Period
Greater of:
—
20 ns or TCY + 40
N
ns N = prescale
value (1, 2, 4, 8)
Asynchronous
60
—
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 —
DS39612A-page 344
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 2003 Microchip Technology Inc.