參數(shù)資料
型號: SAK-C164CH-8FM
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP80
封裝: 0.65 MM PITCH, METRIC, PLASTIC, QFP-80
文件頁數(shù): 49/74頁
文件大?。?/td> 917K
代理商: SAK-C164CH-8FM
&
Data Sheet
51
1999-08
AC Characteristics
Figure 12
External Clock Drive XTAL1
Note: The main oscillator is optimized for oscillation with a crystal within a frequency
range of 4...16 MHz. When driven by an external clock signal it will accept the
specified frequency range. Operation at lower input frequencies is possible but is
guaranteed by design only (not 100% tested).
It is strongly recommended to measure the oscillation allowance (or margin) in the
final target system (layout) to determine the optimum parameters for the oscillator
operation.
External Clock Drive XTAL1
(Operating Conditions apply)
Parameter
Symbol
Direct Drive
1:1
Prescaler
2:1
PLL
1:N
Unit
min.
max.
min.
max.
min.
max.
Oscillator period
W
OSC SR
40
20
60
1)
1) The minimum and maximum oscillator periods for PLL operation depend on the selected CPU clock generation
mode. Please see respective table above.
500
1)
ns
High time
2)
2) The clock input signal must reach the defined levels
9
IL and 9IH2.
W
1
SR
20
3)
3) The minimum high and low time refers to a duty cycle of 50%. The maximum operating frequency (
I
CPU) in
direct drive mode depends on the duty cycle of the clock input signal.
–6–10
ns
Low time
2)
W
2
SR
20
3)
–6–10
ns
Rise time
2)
W
3
SR
–10
–6–10
ns
Fall time 2)
W
4
SR
–10
–6–10
ns
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