Post Go back to editing

SPI configuration of ADF4350

Hi, I met a problem when I using the adf4350 on ad9739a evaluation board.

I've tried to write the verilog code about spi configuration of the ad9739a evaluation board which has two spi devices (adf4350 and ad9739a). I'm sure that the spi code is working normally because the spi data read from ad9739a is right. But the adf4350 spi doesn't work normally. After I configure the register in adf4350, the LD light on the board isn't on. But when I'm using the reference design of ad9739a evaluation board  (hdl and no-os code), the LD light is on. The data written to r0-r5 register of adf4350 is 0x00320000, 0x00008009, 0x00006e42, 0x00000003, 0x008c823c and 0x00580005 which follows the value of reference design. The debug picture of adf4350 spi timing are as follows:

The clock frequency of ILA is 200MHz. According to the datasheet of adf4350, the timing seems to be correct. I don't know why it isn't working.

Parents Reply Children
No Data