Ref design :hdl_2019_r1
we have designed a custom daughter card comprise of two AD9371 transceivers and HMC7044 (clocking purpose).Now ,we tested this hardware along with ZC706.Everything is working as expected but when we test this daughter card with inhouse developed mother card which is having "XC7Z045 ffg 676 -2",one AD9371 is getting initialized successfully where as other AD9371 is facing RX initialization issue (but not TX and OBRX) as shown below
RXFramerStatus = 0x20
Link is enabled
Measured Link Clock 122.879
Reported Link Clock 122.880
Lane rate 4915.200 MHz
Lane rate/40 122.880 MHz
Link status :Data
SYSREF captured :yes
SYSREF alignment error:No
rx_jesd lane 0 status :
CGS state: DATA
lanes status is 2
Initial Frame Synchronization:N0
rx_jesd lane 1 status:
CGS State :DATA
lane status is 2
Initial frame Synchronization :No
we are receiving ZEROS in ADC data .From the above prints I understood that there is a issue in the AD9371 framer .Moreover framer status is 0x20 which indicates that sysref(using continuous sysref from HMC7044) is received but the status of framer is in CGS state and in prints both link status as well as lane status are in DATA state .I am bit confused about this . As one chip is getting initialized I tried to modify the different JESD parameters of that chip to replicate the same issue which is being faced on other chip then my observations are as below
1).when ever I am disabling the sysref to OBRX then the same RX issue is replicated and OBRX is in INIT state(I didn't understand what the relation between them).
2)When ever I introduce any delay in device clock or device sysref then I am facing different issue like link fail but not same as the above issue .
I think sysref is the major player .
Now I repeated the above experiments using ZC706 board but is working perfectly i.e if I introduce any delays also it is working moreover when I disable OBRX sysref, RX is getting initialized and OBRX is in init state only .
I was stuck at this point .Could you please guide me to resolve this issue with our custom mother board .
Thanks in advance