XC2269I Datasheet, PDF (105/134 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller

XC2269I
XC2000 Family Derivatives / Premium Line
Electrical Parameters
4.6.3 External Clock Input Parameters
These parameters specify the external clock generation for the XC2269I. The clock can
be generated in two ways:
• By connecting a crystal or ceramic resonator to pins XTAL1/XTAL2
• By supplying an external clock signal
– This clock signal can be supplied either to pin XTAL1 (core voltage domain) or to
pin CLKIN1 (IO voltage domain)
If connected to CLKIN1, the input signal must reach the defined input levels V_IL and V_IH.
If connected to XTAL1, a minimum amplitude V_AX1 (peak-to-peak voltage) is sufficient for
the operation of the on-chip oscillator.
Note: The given clock timing parameters (t₁ … t₄) are only valid for an external clock
input signal.
Note: Operating Conditions apply.
Table 30 External Clock Input Characteristics
Parameter
Symbol
Values
Oscillator frequency¹⁾
Min.
f_OSC SR 4
Typ.
−
Max.
40
4
−
20
XTAL1 input current
absolute value
|I_IL| CC −
−
20
Input clock high time
t₁ SR 6
−
−
Input clock low time
t₂ SR 6
−
−
Input clock rise time
t₃ SR −
−
8
Input clock fall time
t₄ SR −
−
8
Input voltage amplitude on V_AX1 SR 0.3 x −
−
XTAL1³⁾
V_DDIM
0.4 x −
−
V_DDIM
0.5 x −
−
V_DDIM
Input voltage range limits V_IX1 SR -1.7 + −
1.7
for signal on XTAL1
V_DDIM
Unit Note /
Test Condition
MHz Input = clock
signal
MHz Input = crystal
or ceramic
resonator²⁾
μA
ns
ns
ns
ns
V 4 to 16 MHz
V 16 to 25 MHz
V 25 to 40 MHz
V
4)
Data Sheet
105
V1.3, 2014-07