From Google translate:
I recently used ad9958 to do a DDS. Use the microcontroller to the clock signal to sclk. Strangely, the microcontroller to the clock does not receive the AD9958 sclk, the microcontroller output clock signal is normal. But after receiving the AD9958, the clock is gone. The AD9958's sclk pin is not tied to the other pins. Sometimes can not find the reason. Ask about!
Just to check, does your SCLK comply with the Serial port timing characteristics indicated on the AD9958 datasheet? Also, please share your schematic.
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