Part Number:AM3874
Hi,
In section 9.13.4.2.4 of the AM3874 datasheet,it is recommended for unused DQS pullup to VDD and pulldown to DQSn to GND.
However, the description of the AM5728 datasheet is the reverse, qualitatively the reverse seems to be correct.
Is it incorrect?
If the datasheet of AM3874 is incorrect, could you tell me the concern with this pullup/pulldown?
In our customer product, only the DDR0 controller is used and the DDR1 controller is not used.
DQS is connect to 1.5V with 1 kΩ and DQSn is connect to GND with 1 kΩ on the DDR1 controller side.
If the internal pullup/pulldown setting is the opposite, could you tell me the operational concerns?
Best Regards,
Shigehiro Tsuda