PIC17C4X Datasheet, PDF (158/240 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

PIC17C4X
Applicable Devices 42 R42 42A 43 R43 44
FIGURE 17-5: TIMER0 CLOCK TIMINGS
RA1/T0CKI
40
41
42
TABLE 17-5: TIMER0 CLOCK REQUIREMENTS
Parameter
No.
Sym Characteristic
Min
Typ† Max Units Conditions
40
Tt0H T0CKI High Pulse Width
No Prescaler
0.5TCY + 20 § — — ns
With Prescaler
10*
— — ns
41
Tt0L T0CKI Low Pulse Width
No Prescaler
0.5TCY + 20 § — — ns
With Prescaler
10*
— — ns
42
Tt0P T0CKI Period
TCY + 40 § — — ns N = prescale value
N
(1, 2, 4, ..., 256)
*
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.
§
This specification ensured by design.
FIGURE 17-6: TIMER1, TIMER2, AND TIMER3 CLOCK TIMINGS
TCLK12
or
TCLK3
TMRx
45
46
47
48
48
TABLE 17-6: TIMER1, TIMER2, AND TIMER3 CLOCK REQUIREMENTS
Parameter
No.
Sym Characteristic
Typ
Min
† Max Units Conditions
45
46
47
48
*
†
§
Tt123H TCLK12 and TCLK3 high time
0.5 TCY + 20 § — —
ns
Tt123L TCLK12 and TCLK3 low time
0.5 TCY + 20 § — —
ns
Tt123P TCLK12 and TCLK3 input period
TCY + 40 § — —
N
ns N = prescale value
(1, 2, 4, 8)
TckE2tmrI Delay from selected External Clock Edge to
Timer increment
2TOSC §
— 6 Tosc § —
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.
This specification ensured by design.
DS30412C-page 158
© 1996 Microchip Technology Inc.