SAMA5 custom board design with RAM question

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zbaltzer
Posts: 5
Joined: Sun Sep 20, 2015 9:12 pm

SAMA5 custom board design with RAM question

Thu Mar 03, 2016 12:47 am

When designing my own custom PCB for the SAMA5D36, i see that the xplained board has two RAM chips where they both share a common DDR A0 through A13 connection and one RAM chip has DDR_D0 through DDR_D15 connected and the other has DDR_D16 through DDR_D31.

Is it possible for me to just use one RAM chip connected to DDR_D0 through DDR_D15 or do i need both chips populated and connected as in the xplained schematic?
dlad
Posts: 20
Joined: Mon Jul 27, 2015 4:27 pm

Re: SAMA5 custom board design with RAM question

Thu Mar 03, 2016 10:49 am

Is it possible for me to just use one RAM chip connected to DDR_D0 through DDR_D15 or do i need both chips populated and connected as in the xplained schematic?
SAMA5D3 doesn't support 16-bit data bus width. You will need 32-bit. (either one 32-bit chip or 2x16-bit like sama5d3 xplained).

You will find more information there : http://atmel.force.com/support/articles ... y-SAMA5D3x

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