4 Replies Latest reply on Jul 24, 2013 3:54 AM by userc_43345

    Cypress Sl811hst usb host/slave controller + fpga altera cyclone

              Hi, I am trying to interface a Cypress sl811hst-axc usb host / slave controller with an Altera Cyclone I FPGA, the cyperss chip isn't responding to my signals, I've tried to write an 8bit data to a random address of the chip by driving the controls lines, corresponding to the timing diagram provided with the chip datasheet, and then read at the same address, but with no success, when I try to read a data by putting the output in a high impedence state "Z", I get the address that I've put on the 8 bit lines, so the cypress is not responding to my commands so if anyone is interested, or had a similar problem, give me your ideas or any thought about a possible solution thanks !!