PIC16F871 Microchip Technology Inc., PIC16F871 Datasheet - Page 132

• Manufacturer Part Number: PIC16F871
• Description: 28/40-pin, 8-bit Cmos Flash Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16F870/871
FIGURE 14-8:
TABLE 14-4:
DS30569B-page 130
40*
41*
42*
45*
46*
47*
48
Param
No.
RC0/T1OSO/T1CKI
Note: Refer to Figure 14-3 for load conditions.
Tt0H
Tt0L
Tt0P
Tt1H
Tt1L
Tt1P
Ft1
TCKEZtmr1 Delay from external clock edge to timer increment
*
†
Sym
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.
RA4/T0CKI
TMR0 or
TMR1
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
T0CKI High Pulse Width
T0CKI Low Pulse Width
T0CKI Period
T1CKI High Time
T1CKI Low Time
T1CKI input period Synchronous
Timer1 oscillator input frequency range
(oscillator enabled by setting bit T1OSCEN)
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Characteristic
Synchronous, Prescaler = 1
Synchronous,
Prescaler = 2,4,8
Asynchronous
Synchronous, Prescaler = 1
Synchronous,
Prescaler = 2,4,8
Asynchronous
Asynchronous
40
45
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
Standard(F)
Extended(LF)
Standard(F)
Extended(LF)
Standard(F)
Extended(LF)
Standard(F)
Extended(LF)
Standard(F)
Extended(LF)
Standard(F)
Extended(LF)
42
47
Greater of:
20 or T
Greater of:
Greater of:
30 or T
50 or T
0.5 T
0.5 T
0.5 T
0.5 T
T
2 T
CY
CY
Min
41
100
46
DC
CY
10
CY
10
CY
15
25
30
50
CY
15
25
30
50
60
N
OSC
CY
CY
+ 40
+ 40
N
N
+ 20
+ 20
+ 20
+ 20
+ 40
+ 40
Typ† Max Units
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
 2003 Microchip Technology Inc.
7 T
200
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
OSC
48
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)
Conditions