PIC18F242 MICROCHIP [Microchip Technology], PIC18F242 Datasheet - Page 277

• Manufacturer Part Number: PIC18F242
• Description: 28/40-pin High Performance, Enhanced FLASH Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 22-9:
TABLE 22-8:
© 2006 Microchip Technology Inc.
Param
40
41
42
45
46
47
48
No.
Note:
T1OSO/T1CKI
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
Tcke2tmrI Delay from external T1CKI clock edge to timer
Symbol
TMR0 or
TMR1
T0CKI
Refer to Figure 22-4 for load conditions.
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T1CKI High
Time
T1CKI Low
Time
T1CKI input
period
T1CKI oscillator input frequency range
increment
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous
Asynchronous
Characteristic
40
45
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
PIC18FXXX
PIC18LFXXX
PIC18FXXX
PIC18LFXXX
PIC18FXXX
PIC18LFXXX
PIC18FXXX
PIC18LFXXX
No Prescaler
42
47
20 n
20 n
41
46
0.5T
0.5T
0.5T
Greater of:
0.5T
Greater of:
T
S
S
2 T
CY
or T
or T
Min
CY
CY
CY
DC
10
10
10
25
30
50
10
25
30
50
60
CY
OSC
+ 10
CY
CY
+ 20
+ 20
+ 20
+ 5
N
N
+ 40
+ 40
7 T
Max
PIC18FXX2
50
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OSC
48
Units
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
DS39564C-page 275
N = prescale
value
(1, 2, 4,..., 256)
N = prescale
value
(1, 2, 4, 8)
Conditions