LMK04000BEVALXO National Semiconductor, LMK04000BEVALXO Datasheet - Page 13

• 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

Table 5. LMK040XX Eval Board and CodeLoader *.mac File Cross Reference
LMK040XX
Device
family
LMK040X1
LMK040X1
LMK040X1
LMK040X1
LMK040X3
5. Copy codeldr.ini, other *.ini files and *.mac files supplied with the evaluation board into the CodeLoader
6. Start CodeLoader. See Appendix A for a brief tour of CodeLoader features.
7. Choose the appropriate device from the Select Device drop down menu under the Clock
8. Several common default configurations have been prepared to enable simplified programming of the
9. Select the Bits/Pins tab. To enable the VCO output pin (F
10. To enable the individual clock channel outputs, go to the Clock Outputs tab. In the Clock Output field,
11. See Figure 9 through Figure 13 on the following pages for illustrations of the contents and fields
12. Note: the default communications port is USB. To switch to parallel port (LPT) mode, select the “Port
13. After device configuration in CodeLoader is complete, program the LMK040xx by pressing CTRL+L on
14. After programming, the uWire cable can be unplugged from the evaluation board to minimize
1. F
2. All clock outputs are AC-coupled.
3. All LVPECL/2VPECL clock outputs are terminated to GND with a 120 ohm resistor, one on each
installation directory. Device specific configuration files include LMK04011.ini, LMK04031.ini and
LMK04033.ini. As additional versions of the LMK04000 family are released, they will be accompanied
by specific *.ini files.
Conditioners group.
board. These configurations have been stored in multiple *.mac files that have been supplied with the
evaluation board. Table 5 (see next page) lists these configurations. If the user desires to use a
custom configuration, it is recommended that one of the *.mac files listed in Table 5 be selected as a
starting point. The selected configuration can then be edited and customized to the user’s
requirements. To load a *.mac file, open the “File” menu, then select “Restore”. If Step 5 above was
completed, all *.mac files should be saved in the CodeLoader installation directory on the user’s PC.
Navigate to this directory, otherwise, navigate to the directory where the files are stored and select the
desired file. After a few seconds, the CodeLoader configuration fields will be updated with the settings
stored in the file. A user modified *.mac configuration can be saved using the “Save” option under the
File menu.
select “Enable” for the desired output clock from the drop down menu corresponding to the relevant
clock channel.
contained in each of the CodeLoader configuration tabs.
Setup” tab, then select LPT in the “Communications Mode” block, located in the upper left corner of
the page. LPT1, LPT2 and LPT3 are available options. USB mode can only be used if a USB interface
board is used.
the PC keyboard or select “Load Device” from Keyboard Controls menu. CTRL+L should be pushed
after any configuration change.
noise and EMI.
nominal output level will be -1 dBm.
output pin of the pair.
out
is AC-coupled. A 3 dB pad is installed between the F
VCXO
/
XTAL
VCXO
VCXO
Crystal
Crystal
VCXO
L M K 0 4 0 X X
VCXO/XTAL
Frequency
(MHz)
100
61.44
12.288
12.288
61.44
E V A L U A T I O N
Evaluation Board Notes
PLL1
Reference
clock
(MHz)
10
122.88
122.88
122.88
122.88
13
B O A R D
Configuration file (*.mac)
Std_LMK040X1_10MHZ_ref_100MHZ_VCXO.mac
Std_LMK040X1_122_88MHZ_ref_61_44MHZ_VCXO.mac
Std_LMK040X1_XTAL_1X_122_88MHZ_Ref.mac
Std_LMK040X1_XTAL_2X_122_88MHZ_Ref.mac
Std_LMK040X3_122_88MHZ_ref_61_44MHZ_VCXO.mac
O P E R A T I N G
out
), check the box labeled “EN_Fout”.
out
pin and the SMA connector. The
I N S T R U C T I O N S