Article ID: 000085195 Content Type: Troubleshooting Last Reviewed: 09/11/2012
Can I connect pins SD_DQS[3..0] together when using the Excalibur SDRAM controller?
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Description When using the Excalibur SDRAM controller in SDR mode, SD_DQS must be connected to SD_CLK_N. SD_DQS[3..1] are not used and drive High-Z in SDR mode, so it is safe to connect these pins to other signals, including SD_DQS. However, for signal integrity purposes, it is recommended that SD_DQS[3..1] be left unconnected when using the Excalibur SDRAM controller in SDR mode.