Part Number: DAC38J82
Other Parts Discussed in Thread: LMK04828
hello，
我在使用DAC38J82时对其做如下配置：
DAC Configuration: LMFS=8212, HD=1, K=32, interp=1x , subclass 1, link0 is used.
DAC clock = 1200M , sysref = 18.75M
FPGA clock = 150M , sysref = 18.75M
我没有使用DAC PLL 产生时钟。
根据手册，我认为DAC采样率为1.2G，工作在8lane的line rate应该为6 Gbps，
时钟芯片为 LMK04828
我用频谱仪测量过LMK04828输出了正确的DAC clock = 1200M，FPGA clock = 150M和sysref = 18.75M
读取到的DAC38J82寄存器0x64-0x6B反馈 read_empty : FIFO is empty
寄存器0x6C反馈0x3
我不知道DAC38J82哪里配置有问题，为什么无法正常发送信号？
The output frequency of the LMK04828 is:
DAC clock = 1200M , sysref = 18.75M
FPGA clock = 150M , sysref = 18.75M
I have measured the output frequencies with a spectrum analyzer, and they are correct.
I was expecting a line rate of 6 Gbps for the DAC38J82.
DAC Configuration: LMFS=8212, HD=1, K=32, interp=1x , subclass 1, link0 is used.
I am not use DAC PLL .
The DAC sample rate is 1.2GHz
The error returned by the DAC38J82 is "read_empty: FIFO is empty".
Is there a misconfiguration in the line rate settings?
LMK04828的配置、DAC38J82的配置和读取数据如下：
