Forum Discussion
vondart
New Contributor
New ContributorCyclone IV E implementing SPI
I'm using EP4CE10 as a SPI Master to control LMX2820, then find the control words are not written correctly. Does the I/O pin selection and configuration has special requirement?
Hi,
Regarding the Pin Out, for your device is:
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/dp/cyclone-iv/ep4ce10.pdf
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/dp/cyclone-iv
We do not have any example on SPI for Cyclone IV.
Maybe you could check these out, see if it helps:
https://forum.digikey.com/t/spi-3-wire-master-vhdl/12743
vondartNew Contributor
New ContributorAlso, the RFoutAP wire must be connected, so that the ADC connected to FPGA wont interfere with SPI transmission. The dangling connection seems to either interfere with LMX2820 or interfere with my AD9226 ADC. I also find, connecting grounds of FPGA and LMX2820 may offer benefit.
