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PIC17C4X Datasheet, PDF (187/240 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller | |||
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PIC17C4X
FIGURE 19-5: TIMER0 CLOCK TIMINGS
RA1/T0CKI
Applicable Devices 42 R42 42A 43 R43 44
40
41
42
TABLE 19-5: TIMER0 CLOCK REQUIREMENTS
Parameter
No.
Sym Characteristic
Min
Typâ Max Units Conditions
40
Tt0H T0CKI High Pulse Width No Prescaler
0.5TCY + 20 §
â â ns
With Prescaler
10*
â â ns
41
Tt0L T0CKI Low Pulse Width No Prescaler
0.5TCY + 20 §
â â ns
With Prescaler
10*
â â ns
42
Tt0P T0CKI Period
Greater of:
â â ns N = prescale value
20 ns or Tcy + 40 §
(1, 2, 4, ..., 256)
N
*
These parameters are characterized but not tested.
â
Data in "Typ" column is at 5V, 25ËC unless otherwise stated. These parameters are for design guidance only and are not
tested.
§
This speciï¬cation ensured by design.
FIGURE 19-6: TIMER1, TIMER2, AND TIMER3 CLOCK TIMINGS
TCLK12
or
TCLK3
TMRx
45
46
47
48
48
TABLE 19-6: TIMER1, TIMER2, AND TIMER3 CLOCK REQUIREMENTS
Parameter
No.
Sym Characteristic
Typ
Min
â Max Units Conditions
45
46
47
48
*
â
§
Tt123H TCLK12 and TCLK3 high time
0.5TCY + 20 § â â
ns
Tt123L TCLK12 and TCLK3 low time
0.5TCY + 20 § â â
ns
Tt123P TCLK12 and TCLK3 input period
TCY + 40 § â â
N
ns N = prescale value
(1, 2, 4, 8)
TckE2tmrI Delay from selected External Clock Edge to
Timer increment
2TOSC §
6Tosc §
These parameters are characterized but not tested.
Data in âTypâ column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
This speciï¬cation ensured by design.
© 1996 Microchip Technology Inc.
DS30412C-page 187
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