Hi,
My customer has one question. He is making PCIe daughter card connected with PC.
According to the PCIe specification, /PERST is high after minimum 100ms from 3.3V power-up of PC's mother board. However, his daughter card with XIO2001 has power-supply IC and some delay is occurred. As the result, it is possible to take less than 100ms from /GRST_deassertion to /PERST_deassertion, depend on PC mother board.
On the other hands, XIO2001 datasheet P.21 is described as follows:
Wait a minimum of 100 ms after applying power. The 100-ms limit satisfies the requirement for stable power by the deassertion of PERST.
On the case of less than 100ms between /GRST_deassertion and /PERST_deassertion, how about XIO2001 operation? Does XIO2001 has any issue?
My understanding, if power is stable, there is no issue under this case. Is it correct? I want to confirm it.
Thanks and best regards,
M.HATTORI.