Have you ever had any experience with an ADG3304 IC? I've prepared a circuit which allows to translate logic levels in SPI interface.
I want my circuit to be compatible with both 1.8V and 3.3V logic levels. That's why I used a relay for selecting the output voltage. My master device is attached to Y-signed pins and slave is opposite. My problem is that I can't communicate with neither 3.3V nor 1.8V-supplied slaved-devices. The circuit of the voltage selector works good.
What could be a possible issue?
I used a logic analyzer to check periods. The first screen is wrong communication
This one is correct:
I tried 3 another methods: - I added decoupled capacitors near VCCa any VCCy (100 nF) - CS pin has been pulled up to VCC via a 10k resistor - Voltage divider has been created on a MISO line with 2 10k resistors
Still no results. SPI doesn't work