參數(shù)資料
型號: PIC16F77
廠商: Microchip Technology Inc.
英文描述: 40-Pin 8-Bit CMOS FLASH Microcontrollers(40腳、8位CMOS 閃速微控制器)
中文描述: 40引腳8位CMOS閃存微控制器(40腳,8位的CMOS閃速微控制器)
文件頁數(shù): 135/170頁
文件大?。?/td> 3150K
代理商: PIC16F77
2000 Microchip Technology Inc.
Advance Information
DS30325A-page 135
PIC16F7X
FIGURE 15-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 15-4:
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Note:
Refer to Figure 15-3 for load conditions.
46
47
45
48
41
42
40
RA4/T0CKI
RC0/T1OSO/T1CKI
TMR0 or
TMR1
Param
No.
40*
Sym
Characteristic
Min
Typ
Max
Units
Conditions
Tt0H
T0CKI High Pulse Width
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
0.5T
CY
+ 20
10
0.5T
CY
+ 20
10
T
CY
+ 40
Greater of:
20 or T
CY
+ 40
N
0.5T
CY
+ 20
15
25
30
50
0.5T
CY
+ 20
15
25
30
50
Greater of:
30
OR
T
CY
+ 40
N
Greater of:
50
OR
T
CY
+ 40
N
60
100
DC
ns
ns
ns
ns
ns
ns
Must also meet
parameter 42
Must also meet
parameter 42
41*
Tt0L
T0CKI Low Pulse Width
42*
Tt0P
T0CKI Period
N = prescale value
(2, 4, ..., 256)
45*
Tt1H
T1CKI High Time Synchronous, Prescaler = 1
Synchronous,
Prescaler = 2,4,8
Asynchronous
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Must also meet
parameter 47
Standard(
F
)
Extended(
LF
)
Standard(
F
)
Extended(
LF
)
46*
Tt1L
T1CKI Low Time
Synchronous, Prescaler = 1
Synchronous,
Prescaler = 2,4,8
Asynchronous
Must also meet
parameter 47
Standard(
F
)
Extended(
LF
)
Standard(
F
)
Extended(
LF
)
Standard(
F
)
47*
Tt1P
T1CKI input period Synchronous
N = prescale value
(1, 2, 4, 8)
Extended(
LF
)
N = prescale value
(1, 2, 4, 8)
Asynchronous
Standard(
F
)
Extended(
LF
)
200
ns
ns
kHz
Ft1
Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
TCKEZtmr1 Delay from external clock edge to timer increment
* 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.
48
2Tosc
7Tosc
Legend:
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