Hello,
For a few days I'm trying to communicate with an AMC7823 using SPI, but I'm afraid I'm doing something wrong. It seems that every register I'm trying to read the registers from the chip but the only data I get is 0x0000h on my MOSI line. I changed myCPOL to 0 and my CPHA to 1. As attachment I have sent a screenshot of my logic analyzer.
What I am trying to do is send a read command to read the read the Part Revision Number register (0xE000). So I'm sending 0x8780 or 0x879E. One of those words should work I guess and it should return 0xE000h.
I also configured the power down register, adc control register and the amc status / configuration register and tried to get a value of the ADC's, but also here I got 0x0000h.
Today I found a small issue in my schematic. It seems that I have connected BVDD to 5V while my MCU is running at 3.3V. So I lowered the voltage on AVDD, BVDD and DVDD on the AMC7823 to 3.3V, but am still getting 0x0000h on my MOSI line for every register I'm trying to read.
I also attached a image of the schematic of the AMC7823.
I am sorry to ask for help, because I'm afraid it's a really simple and small thing that I am missing.
Thank you in advance.
Bjorn
