LMK04000BEVALXO National Semiconductor, LMK04000BEVALXO Datasheet - Page 9

• Manufacturer Part Number: LMK04000BEVALXO
• Description: BOARD EVAL PREC CLOCK PLL XO
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMK04000BEVALXO

• Main Purpose: Timing, Clock Conditioner
• Embedded: No
• Utilized Ic / Part: LMK04000
• Primary Attributes: 122.88 MHz Crystal
• Secondary Attributes: Integrated PLL & VCO
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3. Program/Load Device
Press “Ctrl – L”
Assuming the Port Settings are correct, it is
now possible to click “Keyboard Controls”
the device to the current state of the newly
loaded LMK04031B file. Ctrl-L is the
accelerator assigned to the Load Device
option and is very convenient.
Once the device has been loaded, by default CodeLoader will automatically program changed
registers, so it is not necessary to load the device again completely. It is possible to disable this
functionality by ensuring there is no checkmark by the “Mode”
Since a default mode will be restored in the next step, this step isn’t really needed but included to
emphasize the importance of pressing “Ctrl-L” to load the device at least once after starting
CodeLoader, restoring a mode, or restoring a saved setup using the File menu.
See Appendix A: CodeLoader Usage or the CodeLoader 4 instructions located at
http://www.national.com/timing/software/
Troubleshooting Information contains information on troubleshooting communications.
4. Restoring a Default Mode
Click “Mode”
Press “Ctrl – L”
Figure 4 – Setting the 122.88 MHz VCXO Default mode
For the purposes of this walkthrough a default mode will be loaded to ensure a common starting
point. This is important because when CodeLoader is closed, it remembers the last settings used
for a particular device. By loading the default mode a common starting point is ensured.
Loading a mode does not automatically program the device so it is necessary to press “Ctrl – L”
again to program the device.
“Load Device” from the menu to program
L M K 0 4 0 X X - R E V 3
“122.88 MHz VCXO Default”; then
E V A L U A T I O N
for more information on port setup. Appendix J:
Figure 3 - Loading the Device
9
B O A R D
O P E R A T I N G
“AutoReload with Changes.”
I N S T R U C T I O N S