Overview

The LMK5B33414EVM is an evaluation module for the LMK5B33414 Network Clock Generator and Synchronizer. The EVM can be used for device evaluation, compliance testing, and system prototyping. The LMK5B33414 integrates three Analog PLLs (APLL) and three Digital PLLs (DPLL) with programmable loop bandwidth. The EVM includes SMA connectors for clock inputs, optional off-board APLL reference input, and clock outputs to interface the device with 50-Ω test equipment. The onboard TCXO allows for improved performance when using low DPLL loop bandwidths below 10 Hz and when evaluating holdover, locked, or free-run operational modes. The EVM can be configured through the onboard USB microcontroller (MCU) interface using a PC with TI's TICS Pro software graphical user interface (GUI). TICS Pro can be used to program the LMK5B33414 registers.

Features

• LMK5B33414

What is Included

• LMK5B33414EVM
• 3-ft. mini-USB cable (MPN 3021003-03)

What is Needed

• Windows PC with TICS Pro Software GUI
• Test Equipment
  • DC power supply (12 V, 1 A)

What is Recommended

• Test equipment:
  • Signal source analyzer
  • Signal generator / reference clock
  • Real-time oscilloscope
  • Precision frequency counter

Figure 1-1 shows the jumper position with red markings. Figure 1-1 shows the DIP switch positions in either green boxes (for ON) or red boxes (for OFF) in the appropriate location.

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.

To begin using the LMK5B33414, 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. 25-MHz reference clock to IN0_P/N and/or,
   2. 25-MHz reference clock to IN1_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 LMK5B33414 profile from Select Device → Network Synchronizer Clock (Digital PLLs) → LMK5B33414.
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. Ensure 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, you must release that interface by changing its interface setting to DemoMode.
      3. Click Identify to trigger the LED shown in the image below. A blinking LED confirms you are connected to the board you expect. Be aware that USB2ANY devices connected to the PC but not attached to by a TICS Pro instance may blink at a slow rate of 1 second on, 1 second off, continuously. After clicking the Identify button, the LED will flash quickly at about 0.5 seconds on, 0.5 seconds off, for about 5 seconds.
   Figure 2-1 USB LED.

Program the LMK5B33414

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 LMK5B33414 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. It may take some time for the DPLL status bits to reflect lock.

Figure 2-2 Read Status Bits.

Measure

Measurements can now be made at the clock outputs.

The LMK5B33414 is a highly-configurable clock chip with multiple power domains, PLL domains, and clock input and output domains. To support a wide range of LMK5B33414 use cases, the EVM was designed with more flexibility and functionality than needed to implement the chip in a customer system application.

This section describes the power, logic, and clock input and output interfaces on the EVM, as well as how to connect, set up, and operate the EVM. Refer to Figure 4-1.