Other Parts Discussed in Thread: LMK04826, ADS52J90
Hi,
I have problems capturing data (ramp signal) from ADS52J90EVM via TWS14J56EVM. I set up jumpers on ADS... to use on-board 40MHz XTAL as a clock source for LMK04826. Two or three capture requests on HSDC Pro are successful, but the next shows regularly degraded signal:
The next attempt to capture inevitably ends up with timeout error:
Power cycling the TSW board allows for another 2 to 4 capture requests and the situation repeats. The degraded ramp signal looks pretty much the same on each channel.
On TSW board, led D4 blinks ca 0.5Hz, D2, D3, D5, D6, D7 are off, D1, D8 are ON. All the blue power monitoring leds are on.
On ADS board, no led (except for D8 power indicator) is on (I expected D3/D4 PLL lock leds to be on...).
Jumper settings on ADS board are:
JP40: 2-3 (LMK ADC_CLK)
JP41: 1-2 (LMK SYSREF)
JP7: 2-3 (XTAL detrmined by JP8 to LMK CLKIN)
JP8: 2-3 (40MHz XTAL)
JP6: 1-2 (XTAL Powered with 3.3V)
JP4: shorted (XTAL 100MHz powered) - I have test run with JP4 open as well.
As for HMC GUI - I use default configuration loaded on startup with JESD: 16ch, 16x 14b 4ADC/Lane mode (GUI version is 2.8)
The configuration loaded by HSDC Pro (version 4.50, no patch applied) looks matching the HMC configuration:
As a ADC sampling frequency I set 40M in HSDC GUI.
Both boards are powered from single power source - a PC power supply (25A on +5VDC rail).
I will be grateful for any help resolving the problem.