LMK04000BEVAL/NOPB National Semiconductor, LMK04000BEVAL/NOPB Datasheet - Page 22

• 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

Bits/Pins Tab
The Bits/Pins tab allows the user to program bits directly. Many of which are not available on
other tabs. Refer to the datasheet for more detailed information. The bits available are:
• Common Box
• PLL Box
o RESET - Set the reset bit. This will reset the device. In a normal application it is
o POWERDOWN - Place the device in powerdown mode.
o EN_Fout – Enable the Fout port.
o PLL_MUX – Set the function of the LD pin.
o RC_DLD1_Start – Prevent PLL2 from locking until digital lock detect from
o EN_PLL2_XTAL – Enables Crystal mode for PLL2. For use with Crystals as
o EN_PLL2_REF2X – Doubles the reference frequency of PLL2. Note with this is
not necessary to program this bit clear since it is auto-clearing. However in the
CodeLoader software, RESET must be clicked again (cleared) to not cause a reset
every time R7 is programmed.
PLL1 is achieved.
opposed to a VCXO.
enabled, the PLL_R value is invalid. Program the Reference Oscillator on PLL2
Tab to be twice the VCO frequency on PLL1 tab. This adjustment must be done
manually.
L M K 0 4 0 X X - R E V 3
E V A L U A T I O N
Figure 12 - Bits/Pins tab.
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O P E R A T I N G
I N S T R U C T I O N S