TC1797 Datasheet, PDF (149/190 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

5.2.4 Oscillator Pins
TC1797
Electrical Parameters
Table 14 Oscillator Pins Characteristics (Operating Conditions apply)
Parameter
Symbol
Min.
Values
Typ. Max.
Unit Note /
Test Condition
Frequency Range f_OSC CC 4
– 40
MHz Direct Input Mode
selected
8
– 25
MHz External Crystal
Mode selected
Input low voltage at V_ILX SR -0.2
–
XTAL1¹⁾
Input high voltage at V_IHX SR 0.7 × –
XTAL1¹⁾
V_DDOSC3
Input current at
I_IX1 CC –
–
XTAL1
0.3 × V
V_DDOSC3
V_DDOSC3 V
+ 0.2
±25
µA
–
–
0 V < V_IN < V_DDOSC3
1) If the XTAL1 pin is driven by a crystal, reaching a minimum amplitude (peak-to-peak) of 0.3 × V_DDOSC3 is
necessary.
Note: It is strongly recommended to measure the oscillation allowance (negative
resistance) in the final target system (layout) to determine the optimal parameters
for the oscillator operation. Please refer to the limits specified by the crystal
supplier.
5.2.5 Temperature Sensor
Table 15 Temperature Sensor Characteristics (Operating Conditions apply)
Parameter
Symbol
Values
Unit Note /
Min. Typ. Max.
Test Condition
Temperature sensor range T_SR SR -40
150 °C Junction
temperature
Temperature sensor
measurement time
t_TSMT SR –
– 100 µs –
Start-up time after reset
Sensor accuracy
t_TSST SR –
T_TSA CC –
– 10 µs –
– ±6 °C Calibrated
Data Sheet
145
V1.1, 2009-04