C165 datasheet(46/77 Pages) INFINEON

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C165

Data Sheet

V2.0, 2000-12

AC Characteristics

Table 10

External Clock Drive XTAL1 (Standard Supply Voltage Range)

(Operating Conditions apply)

Parameter

Symbol

Direct Drive

1:1

Prescaler

2:1

Unit

min.

max.

min.

max.

Oscillator period

tOSC SR 40

–20

–

High time1)

1) The clock input signal must reach the defined levels V

IL2 and VIH2.

SR 202)

2) The minimum high and low time refers to a duty cycle of 50%. The maximum operating frequency (f

CPU) in

direct drive mode depends on the duty cycle of the clock input signal.

–6–

Low time1)

SR 202)

–6–

Rise time1)

SR –10

–

6ns

Fall time1)

SR –10

–

6ns

Table 11

External Clock Drive XTAL1 (Reduced Supply Voltage Range)

(Operating Conditions apply)

Parameter

Symbol

Direct Drive

1:1

Prescaler

2:1

Unit

min.

max.

min.

max.

Oscillator period

tOSC SR 50

–

High time1)

1) The clock input signal must reach the defined levels V

IL2 and VIH2.

SR 252)

2) The minimum high and low time refers to a duty cycle of 50%. The maximum operating frequency (f

CPU) in

direct drive mode depends on the duty cycle of the clock input signal.

–8–

Low time1)

SR 252)

–8–

Rise time1)

SR –10

–

6ns

Fall time1)

SR –10

–

6ns

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