05-04-2016 06:11 AM
Hello. PCB does not work with chips MT41J128M16HA-125IT and XC6SLX16-2ftg256.
When installing the board initially supply power VDD = VDDQ = VFEFCA = VREFDQ = 1.5 V.
Then I noticed the mistake and made VDD = VDDQ = 1,5 V and VFEFCA = VREFDQ = 0.75 V.
Power VFEFCA = VREFDQ = 1.5 V could damage MT41J128M16HA or XC6SLX16 ?
DDR3 Freq = 303.303 MHz. c3_calib_done = '0'.
05-04-2016 06:46 AM
1.5v is within the recommended IO pin voltages for S6. Have no idea what it may do to the other part, though. Tou would need to review that data sheet.
05-04-2016 06:47 AM
@denruss I don't think XC6SLX16-2ftg256 would go bad since VREF Absolute Maximum (worst case) is 3.75V. [Table 1 of DS162] You are well below it. You may want to check the memory part rating.
05-13-2016 06:28 AM
@denruss Good to hear you were able to recover the board. Just make sure the power supplies are fine and corrected.
Please close this thread by marking the post as "Accept as Solution"