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

2 EVM Quick Start

Table 2-1 describes the default jumper positions for the EVM to power the device from a single 12-V supply provided to VIN4. In positional information about jumpers, "opposite designator” means the jumper is placed opposite of the silkscreen designator.

Table 2-1 Default Jumper and DIP Switch Settings
CATEGORY REFERENCE

DESIGNATOR

 POSITION DESCRIPTION

Power

JP1

1-2 (opposite designator)

LMK5C33414A VDD = 3.3 V from DCDC provided by U500 on top of the PCB.

JP2

1-2 (opposite designator)

LMK5C33414A VDDO = 3.3 V from DCDC provided by U500 on top of the PCB.

JP4

1-2 (opposite designator)

XO VCC = 3.3 V DCDC provided by U500 on top of PCB.

Communication

JP5

1-2, 3-4

Connect I2C from onboard USB2ANY to LMK5C33414A

LMK5C33414A Control Pins

S3

S3[1:2] = OFF

SCS_ADD = no pullup or pulldown.

S1, S2, S4

Sx[1,2] = OFF

Sx[3,4] = ON

Enable 3.9 kΩ pulldown on GPIO0, GPIO1, and GPIO2

To begin using the LMK5C33414A, follow the steps below.

Hardware Setup

  1. Verify the EVM default jumper and DIP switch settings shown in Figure 1-1.
  2. Connect the 12-V external power DC power supply (1-A limit) to:
    1. VIN4 and GND terminals on header J500 (pins 4 and 5, see Figure 3-2.)
  3. Connect references:
    1. 156.25-MHz reference clock to IN0_P and/or,
    2. 10-MHzreference clock to IN1_P/N and/or,
    3. 25-MHz reference clock to IN2_P/N and/or,
    4. 1-PPS reference clock to IN3_P/N.
  4. Connect the USB cable to the USB port at J41.

Software Setup

  1. If not already installed, install the TICS Pro software from the TI website: TICS Pro Software
  2. If the MATLAB R2015b (9.0)* 64-bit Runtime is not already installed, download and install the software from the MathWorks website. While optional for programming and evaluating the default profile settings, Matlab Runtime is necessary for any application that needs to modify the DPLL loop filter settings. See Matlab Runtime.
  3. Start the TICS Pro software.
  4. Select the LMK5C33414A profile from Select Device → Network Synchronizer Clock (Digital PLLs) → LMK5C33414A.
  5. Confirm communications with the board by:
    1. Click USB communications from the menu bar.
    2. Click Interface to launch the Communication Setup pop-up window.
    3. Check these fields in the Communication Setup pop-up window:
      1. Make sure USB2ANY is selected as the interface.
      2. In case of multiple USB2ANY, select desired interface. If a USB2ANY is currently in use in another TICS Pro, then the user must release that interface by changing the interface setting to DemoMode.
      3. Click Identify to trigger the LED shown in the image below. A blinking LED confirms the connection to the board. Be aware that USB2ANY devices connected to the PC but not attached to by a TICS Pro instance blink at a slow rate of 1 second on, 1 second off, continuously. After clicking the Identify button, the LED flashes quickly at about 0.5 seconds on, 0.5 seconds off, for about 5 seconds.
    GUID-20220814-SS0I-P4X4-5WFZ-KVVBQWKRKWGB-low.svg Figure 2-1 USB LED

Program the LMK5C33414A

  1. Toggle the switch S5 (PDN/RESET).
  2. Program all the registers:
    1. Press the Write All Regs button in the toolbar.
    2. Select USB Communications in the menu bar, then select Write All Registers, or press Ctrl + L.
  3. Check the current consumption.
  4. Check LMK5C33414A Status as shown in Figure 2-2.
    1. Go to the Status page of the GUI.
    2. Click Read Status Bits.
    3. Make sure to clear the latched bits. To clear latched bits:
      1. Press the Clear Latched Bits button.
      2. Select Read Status Bits.
    4. Wait to confirm the change. The DPLL status bits can take time to reflect the lock.
GUID-20231205-SS0I-1HGB-MH8S-4KN3VCBDRB1P-low.png Figure 2-2 Read Status Bits

Measure

Measurements can now be made at the clock outputs.