LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 17

• Manufacturer Part Number: LMK04000BEVAL/NOPB
• Description: BOARD EVAL PRECISION CLOCK PLL
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LMK04000BEVAL/NOPB

• Main Purpose: Timing, Clock Conditioner
• Embedded: No
• Utilized Ic / Part: LMK04000
• Primary Attributes: 122.88 MHz VCXO
• Secondary Attributes: Integrated PLL & VCO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMK04000BEVAL; LMK04000BEVAL

L M K 0 4 0 X X
E V A L U A T I O N
B O A R D
O P E R A T I N G
I N S T R U C T I O N S
Figure 10. Clock Outputs tab
The clock outputs tab allows the user to Enable/Disable individual clock channels, select the clock mode
(Bypass/Divided/ Delayed/ Divided & Delayed), set the channel delay value (if Delay is enabled), and the
channel divider value (2,4,6,…,510).
This tab also allows the user to select the VCO Divider value (2,3,…,8). Note that the total PLL2 N divider
value is composed of both the VCO Divider value and the N value shown in the blue box in the image,
and is given by: N
= VCO Divider * N.
TOTAL
Clicking on the blue box that contains R, PDF and N values takes the user to the PLL2 tab where these
values may be changed.
Clicking on the components in the box containing the Internal Loop Filter values allows the user to
change these component values.
The Reference Oscillator value field may be changed in either the Clock Outputs tab or the PLL2 tab.
Note this value MUST match the value of the on-board VCXO (or XTAL option).
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