SNAU295 July   2024 LMK5C33216A

 

  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 48MHz 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  LMK5C33216A and Input References IN0 to IN1 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 OUT15 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 LMK5B33216 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
      1. 6.5.1 DPLL DCO
    6. 6.6  Using the Validation Page
    7. 6.7  Using the GPIO Page
      1. 6.7.1 SYNC/SYSREF/1-PPS Page
    8. 6.8  Using the Outputs Page
    9. 6.9  EEPROM Page
    10. 6.10 Design Report Page

6.3.1.1 Cascade VCO to APLL Reference

Cascading APLLs is controlled by the APLL source box, shown in Figure 6-12. This box is programmed bitwise and is automatically set when generating a frequency plan. The XO_OUT_BUF_EN register in the Input Control section of the User Controls tab is automatically set to enable or disable the XO Output Buffer. The PLLx_RDIV_XO_EN is automatically checked/unchecked in each APLLx tab depending on whether each APLL is using the XO input.

LMK5C33216AEVM APLL Source Box
Located on Inputs page
Figure 6-12 APLL Source Box
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