PIC16LC924-08/CL 查看數據表（PDF） - Microchip Technology
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PIC16LC924-08/CL Datasheet PDF : 189 Pages
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PIC16C9XX
FIGURE 17-6: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
RA4/T0CKI
RC0/T1OSO/T1CKI
40
41
42
45
46
TMR0 or
TMR1
47
48
Refer to Figure 17-2 for load conditions.
TABLE 17-7: TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Sym Characteristic
Min
Typ† Max Units Conditions
40*
Tt0H T0CKI High Pulse Width
No Prescaler
With Prescaler
0.5TCY + 20
10
— — ns Must also meet
— — ns parameter 42
41*
Tt0L T0CKI Low Pulse Width
No Prescaler
With Prescaler
0.5TCY + 20
10
— — ns Must also meet
— — ns parameter 42
42*
Tt0P T0CKI Period
No Prescaler
TCY + 40
— — ns
With Prescaler Greater of:
20 or TCY + 40
N
— — ns N = prescale value
(2, 4, ..., 256)
45*
Tt1H T1CKI High Time Synchronous, Prescaler = 1
0.5TCY + 20
— — ns Must also meet
Synchronous, PIC16C923/924
15
— — ns parameter 47
Prescaler = PIC16LC923/924
25
2,4,8
— — ns
Asynchronous PIC16C923/924
30
— — ns
PIC16LC923/924
50
— — ns
46*
Tt1L T1CKI Low Time Synchronous, Prescaler = 1
0.5TCY + 20
— — ns Must also meet
Synchronous, PIC16C923/924
15
— — ns parameter 47
Prescaler = PIC16LC923/924
25
2,4,8
— — ns
Asynchronous PIC16C923/924
30
— — ns
PIC16LC923/924
50
— — ns
47*
Tt1P T1CKI input period Synchronous PIC16C923/924 Greater of:
— — ns N = prescale value
30 OR TCY + 40
(1, 2, 4, 8)
N
PIC16LC923/924 Greater of:
N = prescale value
50 OR TCY + 40
N
(1, 2, 4, 8)
Asynchronous PIC16C923/924
60
— — ns
PIC16LC923/924
100
— — ns
Ft1 Timer1 oscillator input frequency range
DC
— 200 kHz
(oscillator enabled by setting bit T1OSCEN)
48 TCKEZtmr1 Delay from external clock edge to timer increment
2Tosc
— 7Tosc —
* These parameters are characterized but not tested.
† Data in "Typ" column is at 5V, 25˚C unless otherwise stated. These parameters are for design guidance only and are not
tested.
© 1997 Microchip Technology Inc.
DS30444E - page 151
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