PIC18F1230 MICROCHIP [Microchip Technology], PIC18F1230 Datasheet - Page 284
PIC18F1230
Manufacturer Part Number
PIC18F1230
Description
18/20/28-Pin, Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F1230.pdf
(312 pages)
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PIC18F1230/1330
FIGURE 22-10:
TABLE 22-11: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
DS39758B-page 282
40
41
42
45
46
47
48
Param
No.
Note:
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
Tcke2tmrI Delay from External T1CKI Clock Edge to Timer
TMR0 or TMR1
Symbol
T1OSO/T1CKI
T0CKI
Refer to Figure 22-5 for load conditions.
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
Characteristic
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous, no prescaler
Synchronous,
with prescaler
Asynchronous
Synchronous
Asynchronous
Advance Information
40
45
No prescaler
No prescaler
No prescaler
With prescaler
With prescaler
With prescaler
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
PIC18FXXXX
PIC18LFXXXX
42
47
0.5 T
0.5 T
(T
0.5 T
(T
0.5 T
Greater of:
Greater of:
T
CY
41
20 ns or
20 ns or
CY
46
2 T
CY
Min
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
© 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)
V
V
V
V
N = prescale
value (1, 2, 4, 8)
DD
DD
DD
DD
Conditions
= 2.0V
= 2.0V
= 2.0V
= 2.0V
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