PIC16C745/P Microchip Technology, PIC16C745/P Datasheet - Page 134
PIC16C745/P
Manufacturer Part Number
PIC16C745/P
Description
8-Bit CMOS Microcontrollers with USB
Manufacturer
Microchip Technology
Datasheet
1.PIC16C745P.pdf
(158 pages)
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PIC16C745/765
FIGURE 16-8: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 16-5:
DS41124A-page 134
Param
No.
40*
41*
42*
45*
46*
47*
48
* 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.
T1OSO/T1CKI
Sym
T
T
T
T
T
T
F
TCKEZ
Note: Refer to Figure 16-2 for load conditions.
T
T
T
T
T
T
T
0H
0L
0P
1H
1L
1P
1
TMR0 or
TMR1
TMR
T0CKI
1 Delay from external clock edge to timer increment
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Characteristic
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T1CKI High Time Synchronous, Prescaler = 1
T1CKI Low Time
T1CKI input
period
Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
Synchronous,
Prescaler = 2,4,8
Asynchronous
Synchronous, Prescaler = 1
Synchronous,
Prescaler = 2,4,8
Asynchronous
Synchronous
Asynchronous
Advanced Information
40
45
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler Greater of:
42
47
Min
20 or T
Greater of:
30
Greater of:
50
OR
OR
0.5 T
0.5 T
0.5 T
0.5 T
T
41
46
T
T
CY
2Tosc
CY
CY
CY
100
DC
CY
10
CY
10
CY
15
25
30
50
CY
15
25
30
50
60
+ 40
N
+ 40
+ 40
+ 40
N
N
+ 20
+ 20
+ 20
+ 20
Typ† Max
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
7Tosc
200
1999 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
—
Must also meet
parameter 42
Must also meet
parameter 42
N = prescale value
(2, 4,..., 256)
Must also meet
parameter 47
Must also meet
parameter 47
N = prescale value
(1, 2, 4, 8)
N = prescale value
(1, 2, 4, 8)
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