topic Re: Using LS1043A with single chip 16bit DDR4 in Layerscape

Using LS1043A with single chip 16bit DDR4

andreyromanov — Wed, 08 Mar 2017 19:45:44 GMT

Is it possible use LS1043A with single chip 16bit DDR4 such us 512Mx16 Samsung K4A8G165WB?

Shall I config memory controller for using another bit capacity?

Re: Using LS1043A with single chip 16bit DDR4

Bulat — Thu, 09 Mar 2017 06:30:21 GMT

Yes, a single 16-bit DDR4 chip can be used. DDR_SDRAM_CFG[DBW] defines DDR data bus width.

Regards,

Bulat

Re: Using LS1043A with single chip 16bit DDR4

cyrilstrejc — Wed, 24 May 2017 18:36:12 GMT

Wasn't this possibility canceled? I'm confused. According to LS1043A Reference Manual Rev. 3 02/2017 the DDR_SDRAM_CFG[DBW] has only one allowed (not reserved) value: 01b - 32-bit bus is used. Moreover, in the same Reference Manual a DDR bus width is specified as 32/36 bit, 16-bit not mentioned. The 16-bit width was maybe specified in some older Reference Manual, but I'm not sure, I cannot find the older document anymore.

Please, can you clarify this topic with respect to the current LS1043A Reference Manual (Rev. 3 02/2017)?

Re: Using LS1043A with single chip 16bit DDR4

andreyromanov — Mon, 29 May 2017 18:38:14 GMT

The destributor's support engenier told me:

Design team confirmed that rev 3 manual was corrected by mistake. I already mentioned required setup for 16-bit bus mode. For more information you can either use rev 1 or rev 2 LS1043A manuals, or LS1020A ref manual (all 16-bit instances in the DDR chapter are applicable to the LS1043A).