NXP Semiconductors MC13224V User Manual page 40

Mc1322 series simple media access controller demonstration applications
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Connectivity Test
Please select an option:
There are only two options for the "Set Bulk 4 pF CAP" (bulk capacitor) option:
Enable the 4 pF capacitor
Disable the 4 pF capacitor
For the "Adjust COARSE TUNE" and the "Adjust FINE TUNE" options:
Either the coarse tune or the fine tune is adjusted respectively.
The user must enter a value for either parameter.
— The possible values are 0x00 to 0x0F for the coarse tune parameter
— The possible values are0x00 to 0x1F for the fine tune parameter.
— The application verifies that the value entered is between these ranges; if not the value is
rejected and the parameter value is not updated.
The crystal frequency adjustment is performed using the provided 2 MHz TMR1 reference signal. Use a
frequency counter to measure ppm. The trim should be adjusted typically to less than +/-5 to +/-10 ppm.
The TMR1 pin on the Freescale Network Node Evaluation Board is also
used by the LCD control. The LCD cannot be used while the crystal
adjustment test is being utilized.
MC1322x SMAC Demonstration Application User's Guide, Rev. 1.3
3-14
NOTE
Freescale Semiconductor

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