[moved from Off Topic to GE]
i have a problem using VS1003 , i have connected the typical connection suggested by VLSI solution (VS1003 datasheet) i use a 3.3 regulator and a diode for the IOVDD and CVDD power lines , it must be about 2.6 V , which would be appropriate for that voltage , but to be simple it doesn't work
i've checked the connections twice and it i am sure that there's no mistake , i read the MP3 file on my computer and send it to my MC ATMEGA32L via RS232 and send the read bytes to VS1003 , there's no prblem in reading the MP3 file i've tested it .
i tried to send SCI commands but sometimes DREQ line was always down , and sometimes usually after several reserts it was high but the received SPI bytes was not correct . because fro example i wrote to a register and then i read it , the read byte wasn't the written byte .
i tried to send SDI via recieved bytes from RS232 but there was nothing able to here on output. it wasn't any noise neither , VS1003 really seems to be dead ... !!