i.MX ProcessorsのトピックRe: Question, i.MX6SX eMMC boot

Question, i.MX6SX eMMC boot

SLICE — Mon, 06 Mar 2017 02:53:39 GMT

Dear team,

I would like to ask about eMMC BOOT of i.MX6SX.

My customer is trying to boot-up i.MX6SX from eMMC.

And they saw that boot cannot be done in the following case.

- LCD1_DATA04(SRC_BOOT_CFG04)=H, LCD1_DATA15(SRC_BOOT_CFG15)=H

For the other settings such as below, the boot from eMMC can be done.

- LCD1_DATA04(SRC_BOOT_CFG04)=L, LCD1_DATA15(SRC_BOOT_CFG15)=L

- LCD1_DATA04(SRC_BOOT_CFG04)=L, LCD1_DATA15(SRC_BOOT_CFG15)=H

- LCD1_DATA04(SRC_BOOT_CFG04)=H, LCD1_DATA15(SRC_BOOT_CFG15)=L

They are using eMMC 4.41 compliant chip, and they believe that FastBoot mode and DDR mode can be enabled simultaneously for i.MX6SX eMMC boot.

Is it true?

If yes, please let me know what they should do to achieve enabling both of FastBoot mode and DDR mode.

Thanks,

Miyamoto

Re: Question, i.MX6SX eMMC boot

weidong_sun — Mon, 06 Mar 2017 03:36:41 GMT

Hello Masamichi,

>>is it true?

If yes, please let me know what they should do to achieve enabling both of FastBoot mode and DDR mode.

Yes, FastBoot and DDR mode can be used simultaneously. But these 2 modes must be supported by eMMC device.

Have a great day,
(Weidong)

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Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 06 Mar 2017 03:48:21 GMT

Hello Weidong,

Thanks for your comment.

The customer uses eMMC 4.41 compliant device, so the eMMC chip supports both of FastMode and DDR mode.

Correct?

Thanks,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 13 Mar 2017 07:45:43 GMT

Hello Weidong,

I am still waiting for you!

The customer uses eMMC 4.41 compliant device,

So could you please give advice to achieve eMMC boot with FastBoot and DDR mode simultaneously?

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Thu, 16 Mar 2017 13:23:10 GMT

Hello,

I am still waiting for you!

BR,

miyamoto

Re: Question, i.MX6SX eMMC boot

weidong_sun — Mon, 20 Mar 2017 04:00:52 GMT

Hello Masamichi,

Sorry for my late reply!

I checked errata for i.MX6SX( see document "IMX6SXCE.pdf"), There are no errors clarified on Fast boot with DDR mode in it, so Fast boot with DDR mode should be supported by i.MX6SX.

I configured boot selection according to i.MX6SX EVK board, see following, please!

---------------------------------------------------------------------------------------------------------------------------------------------------------------------

BOOT_CFG1[7:6] = 01 LCD1_DATA7=0 LCD1_DATA6=1 boot from uSHDC

BOOT_CFG1[5] = 1 LCD1_DATA5 = 1 MMC protocal

BOOT_CFG1[4] = 1 LCD1_DATA4 = 1 Fast boot mode

BOOT_CFG1[3:2]=x0 LCD1_DATA3 = x LCD1_DATA2 = 0 Fast boot ACK enable

BOOT_CFG1[1] = 1 LCD1_DATA1 = 1 eMMC reset enabled via the SD_RST pad

BOOT_CFG1[0] = 0 LCD1_DATA0 = 0 Through the SD pad

BOOT_CFG2[7:5] = 110 LCD1_DATA15=1 LCD1_DATA14=1 LCD1_DATA13=0 8bit DDR mode

BOOT_CFG2[4:3] =11 LCD1_DATA12 = 1 LCD1_DATA11=1 Boot from uSDHC-4 port

BOOT_CFG2[2] = 0 LCD1_DATA10 = 0 BOOT cpu /ddr Frequecy 792/400 MHz

------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In additon, see Table 8-18. MMC and eMMC boot details (continued) of reference manual.

In the list, Fast boot and DDR mode are described clearly!

Please let customer try above! If there still exsit issues, I will confirm it with i.MX Expert team!

Have a nice day!

Best Regards,

Weidong

Re: Question, i.MX6SX eMMC boot

Aemj — Tue, 21 Mar 2017 02:47:28 GMT

Hello Weidong,

Thanks for your reply.

On the customer’s lab, they saw boot failed when they set the BOOT_CFGxx as below on the SABRE board.

- LCD1_DATA04(SRC_BOOT_CFG04)=H, LCD1_DATA15(SRC_BOOT_CFG15)=H

In my understanding, one should set BOOT_CFG2[7:5] as below for DDR mode of eMMC.

BOOT_CFG2[7:5]=101: for 4bit DDR

BOOT_CFG2[7:5]=110: for 8bit DDR

Correct?

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 27 Mar 2017 01:13:28 GMT

Hello Weidong,

I am still waiting for your RE.

Thanks,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 27 Mar 2017 04:52:57 GMT

Hello Weidong,

In my customer's understanding, it is possible for i.MX6SX to boot from eMMC with FastBoot and DDR mode simultaneously by setting BOOT_CFG1[4] =1 and BOOT_CFG2[7:5]=110(or 101).

Is it true?

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

b50231katsuhiro — Thu, 30 Mar 2017 01:59:24 GMT

Hi weidong.sun‌

could you please follow-up to this question.

Re: Question, i.MX6SX eMMC boot

weidong_sun — Thu, 30 Mar 2017 02:08:44 GMT

Hi Masamichi,

I discussed the question with FAE and AE team, Fast boot and 8-BIT DDR mode are independent respectively!

I have asked my colleague Jimmy Chan to help to do test on i.MX6SX board for your question, so let us wait for result!

Regards,

Weidong

Re: Question, i.MX6SX eMMC boot

SLICE — Thu, 30 Mar 2017 02:14:03 GMT

Hello wigros.sun‌

Thanks a lot for your support!

I will wait.

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

jimmychan — Thu, 30 Mar 2017 06:40:20 GMT

could you show me all the boot_cfg1[0:7], bootcfg_2[0-7] setting?

thanks.

Re: Question, i.MX6SX eMMC boot

weidong_sun — Thu, 30 Mar 2017 06:51:00 GMT

Hello Masamichi,

I found there is no eMMC Flash on i.mx6sx evk board, it is DNP status. So we have no way to do the test. We will submit the issue to i.MX Expert team.

So I have to say sorry for it, we will have to wait for i.MX Expert team's reply!

Have a nice day!

Weidong

Re: Question, i.MX6SX eMMC boot

SLICE — Thu, 30 Mar 2017 07:15:20 GMT

Hello weidong.sun‌

I have asked the customer about boot_cfg1, boot_cfg2 setting.

Please wait for a while.

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 03 Apr 2017 07:42:53 GMT

weidong.sun‌

The settings are as below.

boot_cfg1[7:0] = b'01110000

boot_cfg2[7:0] = b'11010000

Best Regards,

Miyamoto

Re: Question, i.MX6SX eMMC boot

SLICE — Mon, 03 Apr 2017 07:46:40 GMT

jimmychan‌

I posted the settings of boot_cfg1[0:7], bootcfg_2[0-7] to the Community.

https://community.nxp.com/thread/446176

Thanks,

Miyamoto

Re: Question, i.MX6SX eMMC boot

jimmychan — Wed, 05 Apr 2017 02:23:16 GMT

thanks for your reply. I will ask the expert team for helping this issue. I will let you know when I get the reply.

Re: Question, i.MX6SX eMMC boot

jimmychan — Wed, 05 Apr 2017 02:44:30 GMT

could you tell me who is the customer?

Re: Question, i.MX6SX eMMC boot

SLICE — Wed, 05 Apr 2017 03:18:29 GMT

jimmychan‌

I have sent a message to you.