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Need Instructions on reproducing the digital part of ADF4159 evaluation board

Question asked by wings36 on Aug 31, 2016
Latest reply on Jan 12, 2017 by dyoung1

Hello Sir, 

 

I am designing a wideband frequency synthesizer based on the ADF4159 evaluation board design files. I changed the VCO chip and the loop filter configurations while all other parts are exactly the same as the evaluation board. But now I get confused about how to configure the digital part, i.e. MCU, EEPROM. Could you provide an instruction on this please?

 

Based on your previous instructions, I did 2 things:

1. First I used "EEPROM Programmer 2014" to program the EEPROM chip as you suggested. 

I installed the drivers:

Then in the EEPROM Programmer "Main Functionality", I scan for No EEPROM devices, then programed the VID and PID as you suggested. Then in the device manager, ADF4xxx is shown to be correctly installed:

 

2. I installed the development kit software from the following webpage:

CY3684 EZ-USB FX2LP Development Kit | Cypress Semiconductors 

Then as the "EZ-USB development user guide" suggested, I launched the "USB Control Center" to flash the firmware ".hex" file into the MCU. I got the firmware file from your post here:

https://ez.analog.com/thread/13743#52311 

Then I got the following screenshot:

 

Then I launched the ADF4159 control software and connection is successful. But when I changed those register values, VCO output frequency is never changed. What I got on the spectrum analyzer are always some signals at 1GHz, 2GHz, 3GHz, etc. 

 

Could you help me check my procedures please? I would like to rule out the potential errors from the digital part, then I can investigate the analog part of my design.

Did I do something wrong or in a wrong order? Do I need to flash a "bootloader" into the MCU before flashing the "adf4xxx_usb_fw_1_0.hex" firmware into it? How could I confirm if the PLL chip registers are correctly configured?

 

Many thanks,

Songjie

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