i.MX ProcessorsのトピックRe: SABRE board : 32 data width on DDR3

SABRE board : 32 data width on DDR3

florinmaticu — Mon, 06 Feb 2017 16:09:05 GMT

Hello,

After changing the data width from 64 to 32, I could see that the available memory is only 512MB.

Any advice on what other changes are needed to be able to have 1GB of RAM and using 32 bit data width?

Board : SABRE board i.MX 6 QUADPlus , 1GB DDR3 RAM

u-boot version : rel_imx_4.1.15_1.0.0_ga

File: mx6sabresd.c

static struct mx6_ddr3_cfg mem_ddr = {
.mem_speed = 1600,
.density = 4,
.width = 32, //64
.banks = 8,
.rowaddr = 14,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 4875,
.trasmin = 3500,
};

Re: SABRE board : 32 data width on DDR3

vinodmaverickr0 — Tue, 07 Feb 2017 03:37:21 GMT

Hi Maticu,

You need to add the number of rows and columns for changing the DDR size.

static struct mx6_ddr3_cfg mem_ddr = {

.rowaddr = <value>,

.coladdr = <value>,

you can refer to the datasheet for their value for 1GB DDR size.

Thanks,

Vinod

Re: SABRE board : 32 data width on DDR3

florinmaticu — Wed, 08 Feb 2017 10:16:04 GMT

Hi Kumar,

Thanks for replying.

Although I can't find the datasheet for the SDRAM memory of the IMX6 SabreSD board: MCIMX6QP-SDB.