PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 168

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C77X
FIGURE 15-11: TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
TABLE 15-12
DS30275A-page 168
Param
*
†
No.
40*
41*
42*
45*
46*
47*
48
RC0/T1OSO/T1CKI
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.
TCKEZtmr1 Delay from external clock edge to timer increment
Note: Refer to
Sym
Tt0H
Tt0P
Tt1H
Tt1P
Tt0L
Tt1L
Ft1
RA4/T0CKI
TMR0 or
TMR1
TIMER0 AND TIMER1 EXTERNAL CLOCK REQUIREMENTS
Characteristic
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)
Figure 15-3
for load conditions.
Synchronous, Prescaler = 1
Synchronous,
Prescaler =
2,4,8
Asynchronous PIC16C77X
Synchronous, Prescaler = 1
Synchronous,
Prescaler =
2,4,8
Asynchronous PIC16C77X
Asynchronous PIC16C77X
Advance Information
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
PIC16C77X
PIC16LC77X
PIC16LC77X
PIC16C77X
PIC16LC77X
PIC16LC77X
PIC16C77X
PIC16LC77X
PIC16LC77X
40
45
42
47
Greater of:
20 or T
Greater of:
Greater of:
30
50
0.5T
0.5T
0.5T
0.5T
OR
OR
T
CY
CY
2Tosc
Min
100
DC
CY
CY
CY
CY
10
10
15
25
30
50
15
25
30
50
T
T
60
41
46
N
+ 40
+ 40
CY
CY
+ 20
+ 20
+ 20
+ 20
N
N
+ 40
+ 40
Typ†
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
7Tosc
1999 Microchip Technology Inc.
Max
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
50
48
Units Conditions
kHz
ns
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)