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  • LMK5B33216EVM User's Guide

    • SNAU263A February   2022  – July 2022

       

  • CONTENTS
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  • LMK5B33216EVM User's Guide
  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2EVM Quick Start
  5. 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
  6. 4EVM Schematics
    1. 4.1  Power Supply Schematic
    2. 4.2  Alternative Power Supply Schematic
    3. 4.3  Power Distribution Schematic
    4. 4.4  LMK5B33216 and Input Reference Inputs 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
  7. 5EVM Bill of Materials
    1. 5.1 Loop Filter and Vibration Nonsensitive Capacitors
  8. 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
  9. 7Revision History
  10. IMPORTANT NOTICE
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EVM USER'S GUIDE

LMK5B33216EVM User's Guide

Abstract

The LMK5B33216EVM is an evaluation module for the LMK5B33216 Network Clock Generator and Synchronizer. The EVM can be used for device evaluation, compliance testing, and system prototyping.

Trademarks

All trademarks are the property of their respective owners.

1 Introduction

Overview

The LMK5B33216EVM is an evaluation module for the LMK5B33216 Network Clock Generator and Synchronizer. The EVM can be used for device evaluation, compliance testing, and system prototyping. The LMK5B33216 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 the LMK5B33216 to be evaluated in free-running, locked, or holdover mode of operation. 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 LMK5B33216 registers.

Features

  • LMK5B33216

What is Included

  • LMK5B33216EVM
  • 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, 1A)

What is Recommended

  • Test equipment:
    • Source signal 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.

Figure 1-1 LMK5B33216EVM Default Setting of Jumpers and DIP Switches.

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, “adjacent designator” means the jumper is placed adjacent to the designator. “Opposite designator” means the jumper is placed opposite of the designator.

Table 2-1 Default Jumper and DIP Switch Settings
CATEGORYREFERENCE

DESIGNATOR

POSITIONDESCRIPTION

Power

JP1

1-2 (opposite designator)

LMK5B33216 VDD = 3.3 V from DCDC1 provided by U500 on top of the PCB.

JP2

1-2 (opposite designator)

LMK5B33216 VDDO = 3.3 V from DCDC1 by U500 on top of the PCB.

JP4

1-2 (opposite designator)

XO VCC = 3.3 V from DCDC1 provided by U500 on top of PCB.

Communication

JP5

1-2, 3-4

Connect I2C from onboard USB2ANY to LMK5B33216

LMK5B33216 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 3.9k pulldown on GPIO0, GPIO1, and GPIO2

To begin using the LMK5B33216, 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 4and 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 TICS Pro software from TI website: TICS Pro Software
  2. If the MATLAB R2015b (9.0)* 64-bit runtime is not already installed, download and install from MathWorks website. While optional for programming and evaluating the default profile settings, the Matlab Runtime is necessary for any application that needs to modify the DPLL loop filter settings. See Matlab Runtime.
  3. Start TICS Pro software.
  4. Select the LMK5B33216 profile from Select Device → Network Synchronizer Clock (Digital PLLs) → LMK5B33216.
  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 blink LED shown in Figure 2-1. This 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 second on, 0.5 second off for about 5 seconds.
Figure 2-1 USB LED.

Program the LMK5B33216

  1. Toggle the switch S5 (PDN/RESET).
  2. Program all the registers:
    1. Press the Write All Regs button in toolbar,
    2. Select USB Communications in the menu bar, then select Write All Registers, or
    3. Press Ctrl + L.
  3. Check the current consumption (maximum 1.3 A).
  4. Check LMK5B33216 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.
GUID-20220710-SS0I-L9GS-CV5T-RK675WZNDFF8-low.pngFigure 2-2 Read Status Bits.

Measure

Measurements can now be made at the clock outputs.

 
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