Tool/software:
Hi,
i checked the EVM schematic"PROC164E1-1", used the DDR "MT53E2G32D4DE-046 AUT:C" which is 2ch(32bit) and 2rank.
our project used the DDR "MT53E512M32D1ZW-046 AAT:B" which is 2ch(32bit) single rank.
refer to the guildline"SPRAD66B", there must have T-branch, and the spec is 70/140 ohm. i am confusing if both 70ohm and 140ohm are ok in differential impedance?
