Panasonic eUniStone, Application Note Design Manual

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PAN1322
Application Note
62
Revision 1.2, 2013-12-18
Design Guide
Figure 26. Crystal Trimming using HCI Lite Tool
The crystal trimming procedure using a frequency counter and the HCI Lite tool is as following:
1. Make the 32 MHz clock available at P0.1 or P0.8 using the HCI_Lite tool. (See in
Figure 26
)
a. Select P0.1 or P0.8 pin for output of the 32 MHz clock
b. Click “Open port for 32 MHz”
2. Connect the frequency counter to the appropriate test pin P0.1 or P0.8.
3. The 32 MHz clock signal can now be measured by the frequency counter.
4. Write the trimming value to the Osc_Trim register through the HCI Lite tool. The
start value is 0x19F. (See in
Figure 26)
a. Enter the Osc_Trim value in the text box for Osc_Trim
b. Click “Write Osc_Trim”
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