PIC18F2423 MICROCHIP [Microchip Technology], PIC18F2423 Datasheet - Page 350

• Manufacturer Part Number: PIC18F2423
• Description: 28/40/44-Pin, Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2423/2523/4423/4523
FIGURE 26-9:
TABLE 26-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
DS39755B-page 348
Param
40
41
42
45
46
47
48
49
No.
Note:
T1OSO/T13CKI
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Tcke2tmrI Delay from External T13CKI Clock Edge to
Ft1
Symbol
TMR0 or
Refer to Figure 26-4 for load conditions.
T0CKI
TMR1
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T13CKI
Clock High
Time
T13CKI
Clock Low
Time
T13CKI
Clock Input
Period
Timer Increment
T13CKI Oscillator Input Frequency Range
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous PIC18FXXXX
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous PIC18FXXXX
Synchronous
Asynchronous PIC18FXXXX
Characteristic
40
45
No prescaler
With prescaler
No prescaler
With prescaler
No prescaler
With prescaler
PIC18FXXXX
PIC18LFXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
PIC18LFXXXX
PIC18LFXXXX
Preliminary
42
47
0.5 T
0.5 T
(T
0.5 T
(T
0.5 T
Greater of:
Greater of:
41
T
CY
46
20 ns or
20 ns or
CY
2 T
CY
Min
100
DC
CY
CY
CY
10
10
+ 40)/N
10
25
30
50
10
25
30
50
60
+ 40)/N
CY
OSC
+ 10
+ 20
+ 20
+ 20
+ 5
7 T
Max
50
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OSC
© 2007 Microchip Technology Inc.
48
Units Conditions
kHz
ns
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)
V
V
V
V
N = prescale
value (1, 2, 4, 8)
V
DD
DD
DD
DD
DD
= 2.0V
= 2.0V
= 2.0V
= 2.0V
= 2.0V