PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 257
PIC18C242
Manufacturer Part Number
PIC18C242
Description
High-Performance Microcontrollers with 10-Bit A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18C242.pdf
(296 pages)
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FIGURE 21-9: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 21-8:
Param
40
41
42
45
46
47
48
7/99 Microchip Technology Inc.
No.
T1OSO/T1CKI
Note: Refer to Figure 21-4 for load conditions.
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
Tcke2tmrI Delay from external T1CKI clock edge to
Symbol
TMR0 or
TMR1
T0CKI
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
timer increment
Synchronous, no prescaler
Synchronous,
Asynchronous
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous
Asynchronous
with prescaler
Characteristic
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
PIC18CXXX
PIC18LCXXX
PIC18CXXX
PIC18LCXXX
PIC18CXXX
PIC18LCXXX
PIC18CXXX
PIC18LCXXX
40
45
Preliminary
42
47
20 n
20 n
0.5T
0.5T
0.5T
Greater of:
0.5T
Greater of:
T
S
S
41
46
CY
2Tosc
or T
or T
TBD
Min
CY
CY
CY
DC
10
10
10
25
30
50
10
25
30
60
CY
+ 10
CY
CY
+ 20
+ 20
+ 20
+ 5
N
+ 40
+ 40
N
7Tosc
Max
TBD
50
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
PIC18CXX2
48
Units
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
DS39026B-page 257
N = prescale
(1, 2, 4,..., 256)
N = prescale
(1, 2, 4, 8)
Conditions
value
value
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