PIC17C7XX_13 Datasheet, PDF (252/306 Pages) Microchip Technology – High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
FIGURE 20-9:
RA1/T0CKI
TIMER0 EXTERNAL CLOCK TIMINGS
40
41
42
TABLE 20-4: TIMER0 EXTERNAL CLOCK REQUIREMENTS
Param
No.
40
41
42
Sym
Characteristic
Tt0H T0CKI High Pulse Width
Tt0L T0CKI Low Pulse Width
Tt0P T0CKI Period
No Prescaler
With Prescaler
No Prescaler
With Prescaler
†
Data in "Typ" column is at 5V, 25°C unless otherwise stated.
Min
0.5TCY + 20
10
0.5TCY + 20
10
Greater of:
20 ns or TCY + 40
N
Typ† Max Units Conditions
— — ns
— — ns
— — ns
— — ns
— — ns N = prescale
value (1, 2, 4, ...,
256)
FIGURE 20-10: TIMER1, TIMER2 AND TIMER3 EXTERNAL CLOCK TIMINGS
TCLK12
or
TCLK3
45
46
TMRx
47
48
48
TABLE 20-5: TIMER1, TIMER2 AND TIMER3 EXTERNAL CLOCK REQUIREMENTS
Param
No.
45
46
47
Sym
Characteristic
Tt123H
Tt123L
Tt123P
TCLK12 and TCLK3 high time
TCLK12 and TCLK3 low time
TCLK12 and TCLK3 input period
48
TckE2tmrI Delay from selected External Clock Edge to
Timer increment
†
Data in “Typ” column is at 5V, 25C unless otherwise stated.
Min
Typ† Max Units Conditions
0.5TCY + 20 —
—
ns
0.5TCY + 20 —
—
ns
TCY + 40
—
—
ns N = prescale
N
value (1, 2, 4, 8)
2TOSC
— 6Tosc —
DS30289C-page 252
 1998-2013 Microchip Technology Inc.