Analog Devices AD9166-FMC-EBZ, User Manual

Page: 19 / 23

AD9166-FMC-EBZ User Guide UG-1698
Rev. 0 | Page 19 of 23
TROUBLESHOOTING
Debugging the Evaluation Board Using On-Board LEDs
There are six LEDs on the AD9166-FMC-EBZ evaluation board:
DS1, DS2, DS3, DS4, DS5, and DS8.

12 V power LED: DS2 = on indicates that 12 V was applied
to the evaluation board.

LTC2928 power sequencer LEDs: DS8 = on and DS1 = off
indicate that the AD9166 supplies have sequenced correctly
and the monitored supplies are within the specified voltage
range, according to the limits programmed in the
LTC2928 . DS1 = on indicates a power sequencing fault. For
debugging, the response of the LTC2928 to a fault
condition can be overridden by shorting the 2-pin header,
P2. Shorting P2 signals to the
LTC2928 to maintain power
to the AD9166 despite a sequencing fault, which in turn
may damage the AD9166 .

HMC7044 fault LED: DS4 = on indicates an issue with the
HMC7044 . When either PLL1 or PLL2 is used, an on state
indicates that one of the PLLs did not lock. When PLL1
and PLL2 are not used, an on state indicates an issue with
the output dividers. This LED is connected to a general-
purpose input/output (GPIO) pin, and its function can be
programmed by writing to the appropriate
HMC7044 SPI
register.

ADF4372 fault LED: DS5 = on indicates the ADF4372 PLL
locked correctly. This LED turns on only if the ADF4372 is
used to generate a clock. This LED stays off by default. This
LED is connected to the MUXOUT pin of the
ADF4372 ,
and its function can be programmed by writing to the
appropriate
ADF4372 SPI register.

AD9166 interrupt request (IRQ) LED: DS3 is connected to
the IRQ pin of the AD9166 . DS3 = on may indicate an
unreliable JESD204B link, or another fault as reported by
the
AD9166 . The specific error can be read from the
AD9166 registers. See the AD9166 data sheet for details. In
a tested platform such as the AD9166-FMC-EBZ evaluation
board, the majority of JESD204B link issues are due to
improperly configured external clocking. Make sure all
clocks are properly configured and are set to the correct
frequencies.
When the AD9166-FMC-EBZ evaluation board is properly
configured, the LEDs illuminate as follows:

DS2 = on

DS8 = on and DS1 = off

DS4 = off

DS5 = on (if the ADF4372 is used)

DS3 = off
DPGDownloader Does Not Recognize the Evaluation
Board
The AD9166-FMC-EBZ evaluation board can be run with or
without an
ADS7-V2EBZ , as long as it is connected across the
FMC connector to a carrier board that supports the VITA 57.x
standard.
When using the ADS7-V2EBZ , connect the evaluation board to
its FMC connector. With a USB cable connecting the ADS7-
V2EBZ to a PC, open the DPGDownloader software. When the
DPGDownloader software recognizes the ADS7-V2EBZ , it
attempts to read the evaluation board ID of the AD9166-FMC-
EBZ through the FMC connector and across an I
2
C bus. With a
board recognized, the
DPGDownloader
uploads the image
onto an FPGA on board the ADS7-V2EBZ . The image must
correspond to the evaluation board that is connected to the
ADS7-V2EBZ . With the image loaded, the ADS7 then applies
power to the AD9166-FMC-EBZ evaluation board.
If the
DPGDownloader
software does not recognize the evalua-
tion board, it does not load an FPGA image and does not apply
power to the evaluation board. If no FPGA image is loaded and
no power is applied to the evaluation board, confirm all hardware
is properly connected. Close the
DPGDownloader software,
power down the ADS7-V2EBZ , unplug the USB cable, and
gently unplug the evaluation board from the FMC connector.
Inspect the FMC connector for bent pins or other damage.
Then reconnect the hardware and reopen
DPGDownloader .
If DPGDownloader still does not recognize the AD9166-FMC-
EBZ evaluation board, make sure that it is the latest version availa-
ble at
wiki.analog.com/resources/eval/dpg/dacsoftwaresuite ..
It is possible that the firmware on the ADS7-V2EBZ is outdated.
The firmware can be updated from DPGDownloader if
necessary. Refer to the ADS7-V2EBZ Firmware Update Needed
section for more details.
DPGDownloader Does Not Recognize an ADS7-V2EBZ
To confirm that the DPGDownloader software recognizes a
particular ADS7-V2EBZ board, connect the board to a PC using a
USB cable. If the evaluation board is not connected to the FMC
port of the
ADS7-V2EBZ , the DPGDownloader software
automatically loads a generic FPGA image onto the ADS7-
V2EBZ . However, if the AD9166-FMC-EBZ evaluation board is
connected to the FMC port, the DPG Downloader attempts to
recognize the evaluation board and loads an FPGA image onto the
ADS7-V2EBZ that is compatible with the AD9166-FMC-EBZ
evaluation board.
JESD204B Link Does Not Come Up
The start-up sequences for the JESD204B link, as referenced in
this user guide, are tested on the AD9166-FMC-EBZ evaluation
board and are known to work. If the JESD204B link does not
synchronize correctly (does not come up), an issue with the
clocking configuration or settings is likely.