EVM Quick Start
8
SNAU236A – June 2018 – Revised December 2018
Copyright © 2018, Texas Instruments Incorporated
LMK05318EVM User's Guide
lock the DPLL.
6. Check that the LEDs D7 and D8 are both OFF after a valid clock input is detected. This indicates the
that DPLL is locked and that the DPLL holdover is not active.
a. When the DPLL is locked, the output clocks should track the frequency accuracy of the clock input.
7. Check for any clock outputs on the OUT[0:7] SMA ports. TI recommends the following best practices
when making noise-sensitive performance measurements:
a. Use an appropriate balun to interface a differential output clock to the single-ended input of an RF
test equipment (phase noise or spectrum analyzer).
b. Properly terminate any active output clock trace by placing a 0-
Ω
load on the SMA port to minimize
noise due to reflections. Otherwise, disable any unused outputs by register programming.
NOTE:
OUT7_P/N traces are DC-coupled to its SMA ports to allow evaluation of low-frequency
outputs (like 1 PPS) as well as LVCMOS or HCSL output types. Add an external DC blocking
cap between the OUT7 port and the input of any test equipment that cannot tolerate DC
bias.
8. Connect the USB cable from connector J35 to the PC and configure the device through the TICS Pro
software to program the LMK05318 through the USB interface.
a. See
for TICS Pro installation and usage.
TICS Pro uses the "USB2ANY" API software driver to control the USB MCU interfaces (I
2
C/SPI and Logic
pins) on the EVM. TICS Pro can be used to access the device registers and program the device EEPROM
for a different start-up configuration.
1.1
Device Revision Identification
Pre-production devices may have been distributed to customers as engineering sample parts or mounted
on pre-release EVMs. If a pre-production device or EVM is detected, TI recommends that the user replace
the pre-production device with a production device or EVM when available. Production samples and EVMs
can be ordered from
or requested through your local TI Field Sales representative.
The user can read the Device Revision ID (REVID) Register R3 to find the device revision in the TICS Pro
GUI or other serial host interface. See
.
Table 2. Device Revision IDs
REVID REGISTER R3 VALUE
DEVICE REVISION
COMMENT
0x00
Pre-production device
TI recommends to replace with a production device or EVM,
or contact TI Field Sales for technical support.
0x11
Production device
Okay to use.
1.2
Default EVM Configuration
•
Power Supplies:
–
VIN1: 5 V (External supply to onboard LDO regulators)
–
DUT VDD: 3.3 V from LDO1 (U3)
–
DUT VDDO: 1.8 V from LDO2 (U3)
–
XO: 3.3 V from LDO3 (U4)
–
VDDGPIO: 3.3 V from VDD
•
LMK05318 DUT (U5):
–
Clock Inputs:
•
PRIREF and SECREF: DC-coupled from SMA ports
–
Clock Outputs:
•
OUT[0:6]: AC-coupled to SMA ports
•
OUT7: DC-coupled to SMA ports