PIC16C71X
Applicable Devices 710 71 711 715
FIGURE 15-5: TIMER0 EXTERNAL CLOCK TIMINGS
RA4/T0CKI
41
40
42
TMR0
Note: Refer to Figure 15-1 for load conditions.
TABLE 15-5: TIMER0 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Sym Characteristic
Min
Typ† Max Units Conditions
40*
Tt0H T0CKI High Pulse Width
No Prescaler
With Prescaler
No Prescaler
With Prescaler
No Prescaler
With Prescaler
0.5TCY + 20
10
—
—
—
—
—
—
—
—
—
—
ns Must also meet
parameter 42
ns
41*
42*
Tt0L T0CKI Low Pulse Width
Tt0P T0CKI Period
0.5TCY + 20
10
ns
ns
Must also meet
parameter 42
TCY + 40
ns N = prescale value
(2, 4,..., 256)
Greater of:
20 ns or TCY + 40
N
*
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.
DS30272A-page 144
1997 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
