XC2220U Datasheet, PDF (86/105 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller with 32-Bit Performance

2) Overload conditions must not occur on pin XTAL1.
XC2220U
XC2000 Family / Compact Line
Electrical Parameters
Note: For crystal/resonator operation, it is strongly recommended to measure the
oscillation allowance (negative resistance) in the final target system (layout) to
determine the optimum parameters for oscillator operation.
The manufacturers of crystals and ceramic resonators offer an oscillator
evaluation service. This evaluation checks the crystal/resonator specification
limits to ensure a reliable oscillatior operation.
t₁
t₃
V_OFF
V_AX1
t2
t_OSC = 1/f_OSC
Figure 19 External Clock Drive XTAL1
0.9 VAX1
0.1 VAX1
t₄
MC_ EXTCLOCK
Data Sheet
82
V1.2, 2012-07