PIC18F248-E/L MICROCHIP [Microchip Technology], PIC18F248-E/L Datasheet - Page 348

• Manufacturer Part Number: PIC18F248-E/L
• Description: 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 27-10:
TABLE 27-10: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
DS41159E-page 346
PIC18FXX8
40
41
42
45
46
47
48
Legend: TBD = To Be Determined
Param
No.
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
Tcke2tmrI Delay from External T1CKI Clock Edge to
Symbol
Note: Refer to Figure 27-5 for load conditions.
T1OSO/T1CKI
TMR0 or
T0CKI
TMR1
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T1CKI
High Time
T1CKI
Low Time
T1CKI
Input Period
T1CKI Oscillator Input Frequency Range
Timer Increment
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous PIC18FXX8
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous PIC18FXX8
Synchronous
Asynchronous
Characteristic
No prescaler
With prescaler
No prescaler
With prescaler
No prescaler
With prescaler
PIC18FXX8
PIC18LFXX8
PIC18LFXX8
PIC18FXX8
PIC18LFXX8
PIC18LFXX8
40
45
42
47
20 ns or T
20 ns or T
0.5 T
0.5 T
0.5 T
0.5 T
Greater of:
Greater of:
T
2 T
CY
TBD
41
Min
46
DC
CY
10
CY
10
CY
10
25
30
50
10
25
30
60
CY
OSC
+ 10
CY
CY
+ 20
+ 20
+ 20
+ 5
N
N
+ 40
+ 40
7 T
Max
TBD
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
50
OSC
© 2006 Microchip Technology Inc.
48
Units
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
N = prescale value
(1, 2, 4,..., 256)
N = prescale value
(1, 2, 4, 8)
Conditions