SNAU296 December   2023 LMK5C33414A

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2EVM Quick Start
  6. 3EVM Configuration
    1. 3.1  Power Supply
    2. 3.2  Logic Inputs and Outputs
    3. 3.3  Switching Between I2C and SPI
    4. 3.4  Generating SYSREF Request
    5. 3.5  XO Input
      1. 3.5.1 48-MHz TCXO (Default)
      2. 3.5.2 External Clock Input
      3. 3.5.3 Additional XO Input Options
      4. 3.5.4 APLL Reference Options
    6. 3.6  Reference Clock Inputs
    7. 3.7  Clock Outputs
    8. 3.8  Status Outputs and LEDs
    9. 3.9  Requirements for Making Measurements
    10. 3.10 Typical Phase Noise Characteristics
  7. 4EVM Schematics
    1. 4.1  Power Supply Schematic
    2. 4.2  Alternative Power Supply Schematic
    3. 4.3  Power Distribution Schematic
    4. 4.4  LMK5C33414A and Input References IN0 to IN3 Schematic
    5. 4.5  Clock Outputs OUT0 to OUT3 Schematic
    6. 4.6  Clock Outputs OUT4 to OUT9 Schematic
    7. 4.7  Clock Outputs OUT10 to OUT13 and Clock Inputs IN2 and IN3 Schematic
    8. 4.8  XO Schematic
    9. 4.9  Logic I/O Interfaces Schematic
    10. 4.10 USB2ANY Schematic
  8. 5EVM Bill of Materials
    1. 5.1 Loop Filter and Vibration Nonsensitive Capacitors
  9. 6Appendix A - TICS Pro LMK5C33414A Software
    1. 6.1  Using the Start Page
      1. 6.1.1 Step 1
      2. 6.1.2 Step 2
      3. 6.1.3 Step 3
      4. 6.1.4 Step 4
      5. 6.1.5 Step 5
      6. 6.1.6 Step 6
      7. 6.1.7 Step 7
    2. 6.2  Using the Status Page
    3. 6.3  Using the Input Page
      1. 6.3.1 Cascaded Configurations
        1. 6.3.1.1 Cascade VCO to APLL Reference
    4. 6.4  Using APLL1, APLL2, and APLL3 Pages
      1. 6.4.1 APLL DCO
    5. 6.5  Using the DPLL1, DPLL2, and DPLL3 Pages
    6. 6.6  Using the Validation Page
      1. 6.6.1 DPLL DCO
    7. 6.7  Using the GPIO Page
    8. 6.8  SYNC/SYSREF/1-PPS Page
    9. 6.9  Using the Outputs Page
    10. 6.10 EEPROM Page
    11. 6.11 Design Report Page

6.3 Using the Input Page

The Input page provides a high-level view of all the inputs for the device, the APLL frequencies, and DPLL frequencies of the device.

When the DPLL dividers and loop filter are calculated by running the script in step 7 on the Start page, this page displays the DPLL divider values which set the DPLL frequency. This example shows that the DPLL frequency is the exact desired frequency.

Each DPLL supports two sets of DPLL dividers which can be selected. At this time, the tool calculates the divider for FB Config 1 only. To use two different feedback dividers, the following procedure needs to be preformed.

  1. Div #1 settings can be copied into Div #2 settings and selected for use by the DPLL Div Select control.
  2. The references that require the Div #2 settings needs to be set to FB Config 2.
  3. The user can run a second calculation (re-perform a run script, step 7 on Start page, of the DPLL), which repopulates Div #1 settings with the new values for FB Config 1.
    1. Div #2 settings remains the same as the ones initial copied over in step 1.

When using both feedback dividers, the TDC rates do not have to be exactly the same, only that the TDC rates are within ±5% for the two DPLL feedback configurations.

GUID-20231205-SS0I-BG3H-SCTR-PKTNFK0LZX6N-low.png Figure 6-9 APLL or DPLL Frequency Selection
GUID-20231205-SS0I-2N7W-W0Q0-N3W9KZJCNRSC-low.png Figure 6-10 PLL3 Input
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