SAF-XC858CA-16FFI5V 查看數據表（PDF） - Infineon Technologies
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SAF-XC858CA-16FFI5V Datasheet PDF : 124 Pages
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XC858CA
Electrical Parameters
4.3.6 External Clock Drive XTAL1
Table 44 shows the parameters that define the external clock supply for XC858. These
timing parameters are based on the direct XTAL1 drive of clock input signals. They are
not applicable if an external crystal or ceramic resonator is considered.
Table 44 External Clock Drive Characteristics (Operating Conditions apply)
Parameter
Symbol
Limit Values Unit Test Conditions
Min. Max.
Oscillator period
tosc
SR 50
500
High time
t1
SR 15
-
Low time
t2
SR 15
-
Rise time
t3
SR -
10
Fall time
t4
SR -
10
1) The clock input signals with 45-55% duty cycle are used.
ns
1)2)
ns
2)3)
ns
2)3)
ns
2)3)
ns
2)3)
2) Not all parameters are 100% tested, but are verified by design/characterization and test correlation.
3) The clock input signal must reach the defined levels VILX and VIHX.
t1
t3
0.5 VDDC
Figure 41
t2
tOSC
External Clock Drive XTAL1
t4
VIHX
VILX
Data Sheet
110
V1.0, 2010-03
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