Category: Software
Product Number: ADF4155
Hello,
I have built a frequency synthesizer board using an FTDI chip and an ADF4155 PLL chip. I’ve attempted to program it, but I’ve been unsuccessful so far. I suspect that the issue might be with my SPI connection. I have connected the FTDI chip to the ADF4155 PLL exactly as it is on the Eval-board (10k resistors, power supply, ...). Below is how I have connected the pins:
- ADBUS 0 (SCK) → CLK (Pin 1) of ADF4155 (Clock Line)
- ADBUS 1 (MOSI) → DATA (Pin 2) of ADF4155 (Data Input)
- ADBUS 3 (CS) → CE (Pin 4) of ADF4155 (Chip Enable / Chip Select)
- ADBUS 4 (Optional) → LE (Pin 3) of ADF4155 (Latch Enable)
Do you think there could be an issue with this pin mapping or connection, or is it more likely that the problem lies in my programming?
Additionally, could you provide some source code for interfacing with the ADF4155, specifically how to modify it for use with an FTDI chip?
Thank you for your help!
Best regards,
Rina
