Datasheet

PIC16C71X
DS30272A-page 98  1997 Microchip Technology Inc.
Applicable Devices 710 71 711 715
FIGURE 11-6: TIMER0 EXTERNAL CLOCK TIMINGS
TABLE 11-5: TIMER0 EXTERNAL CLOCK REQUIREMENTS
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
40
Tt0H T0CKI High Pulse Width No Prescaler 0.5TCY + 20* — — ns Must also meet
parameter 42
With Prescaler 10* — — ns
41 Tt0L T0CKI Low Pulse Width No Prescaler 0.5TCY + 20* — — ns
Must also meet
parameter 42
With Prescaler 10* — — ns
42 Tt0P T0CKI Period Greater of:
20 ns or TCY + 40*
N
— — ns N = prescale value
(2, 4,..., 256)
48 Tcke2tmrI Delay from external clock edge to timer increment 2Tosc — 7Tosc —
* 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.
Note: Refer to Figure 11-1 for load conditions.
41
42
40
RA4/T0CKI
TMR0