i.MX Processors中的主题 Re: Programing bootloader into nandflash using imx27

Programing bootloader into nandflash using imx27

zhangjay — Thu, 23 May 2013 07:10:31 GMT

Dear all,

I'm newbie here for programing boot image into nandflash by using imx27.

In our project, the hardware, so I should programing the bootloader image into flash to boot our board.

In our board

CPU imx27

Nandflash K9F2G08U0B

I download the new version Advanced ToolKit, refer the user guider and select the correct nand flash type,

I always get the error message:

Connection error. Please reset the board and make sure the board in bootstrap mode.

I have check the bootstrap mode that the boot0-3 pin is low.

In our board the CPU and NAND FLASH are both empty(never programing anything before), what can I do with this issue?

I check the issue from Internet, others had used the H-JTAG to program the bin file into nandflash, I have payed it online, but I have not get it.But I will try by that.

Is there anyone can give some advice.

Thanks anyway!

Re: Programing bootloader into nandflash using imx27

Yuri — Thu, 30 May 2013 06:36:12 GMT

When "boot0-3 pin is low" and the ATK states "Connection error. Please reset the board and make sure the board in bootstrap mode" - often this means the i.MX27 does not start.

Below are general recommendation regarding boot issues :

Please check in 32KHz input clock is present and proper (voltage level, off-duty factor).

II.

Please pay special attention on PLLs supply (FPMVDD, MPLLVDD,UPLLVDD) - if they

meet Hardware Specs in the MX27 Datasheet are have no ripples.

III.

Is power up sequence fully correct ?

Especially - if reset signal is active for sufficient time, while power voltages

are not stable.

Let me remind, the i.MX27 Datasheet takes special attention on FuseVDD and QVDD

relations :

"It is important that the applications processor power supplies be powered-up in

a certain order to avoid unintentional fuse blown. QVDD should be powered up

before FUSEVDD."

The i.MX27 Datasheet also provides two variants :

"The recommended order is:

1. QVDD(1.5 V)

2. FUSEVDD (1.8 V), NVDD (1.8/2.775 V), and Analog Supplies (2.775 V).

1. QVDD (1.5 V), NVDD (1.8/2.775 V), and Analog Supplies (2.775 V).

2. FUSEVDD (1.8 V)."

IV.

Please check if POR signal is asserted while all power supply voltages are not stable.

Perhaps it makes sense to prolong POR. To be latched / detected, minimal POR

duration is 4 x 1 / 32KHz, But in the same time, it is general rule, that POR

must be asserted while

- input clocks are not proper and stable ;

- supply voltages are not proper and stable.

So, minimal POR duration is application / design dependent.

Practically POR of 1-2 sec should be enough for most cases.

Re: Programing bootloader into nandflash using imx27

JorgeRama_rezRi — Thu, 30 May 2013 21:57:52 GMT

Hi Jay,

What silicon version do you have? If you have 2.2 (latest one), could you please test your system by changing the power up sequence of the MC13783? Please configure the PUMS[3:1] pins of the MC13783 as follows:

PUMS3 = Open

PUMS2 = GND

PUMS1 = GND

Can you connect this way?

Can you reproduce the issue in all of your boards? If not, what's the yield?

It is also important to make sure that the workarounds for erratas 10 and 13 are implemented in your system. You can find the errata of the i.MX27 in the Freescale website at http://cache.freescale.com/files/32bit/doc/errata/MCIMX27CE.pdf?fpsp=1&WT_TYPE=Errata&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation

Best regards.

Jorge.

Re: Programing bootloader into nandflash using imx27

JorgeRama_rezRi — Thu, 30 May 2013 22:00:23 GMT

By the way, did you follow Freescale's PDK MC13783 configuration and connections in your system? If not, please send me your schematic and I'll let you know how to change the PUMS connections for your system specifically.

Best regards.

Jorge.

Re: Programing bootloader into nandflash using imx27

shinengsong — Fri, 31 May 2013 11:45:30 GMT

Hi Yuri :
Thank for your information about the issue "Connection error Please reset the board and make sure the board in bootstrap mode".I will send the waveform (32KHz clock,ripples,power up sequence,POR) to you ,but i don't

know your E-MAIL.

Established the channel between PC and IMX27.PC send the first CMD"06 06 02 04 00 00 00 00 00 00 00 00 00 00 00 00" to IMX27 when Program NAND FLASH with "ATK".normally ,IMX27 will receive command and Parser the command then send response data (56 78 78 56)to host.can you sure "IMX27 initialized MDDR nad nand FLASH

in during coures of receive command and Parser the command".

Re: Programing bootloader into nandflash using imx27

shinengsong — Mon, 03 Jun 2013 02:20:40 GMT

Hi Yuri:
I modified crystal Y9 to Y10(please refer the following picture) then measured
the signal of 32.768KHZ and find it's improper(frequency and voltage level is shifted)

Re: Programing bootloader into nandflash using imx27

shinengsong — Mon, 03 Jun 2013 02:44:16 GMT

Hi Jorge:
I will send the schematic to you .

Re: Programing bootloader into nandflash using imx27

shinengsong — Mon, 03 Jun 2013 03:03:38 GMT

Hi Yuri:
Please refer the following picture about ripple ,power up ,POR.

Re: Programing bootloader into nandflash using imx27

Yuri — Mon, 03 Jun 2013 04:29:25 GMT

As for 32Khz - the waveform is correct for XTAL output.

Re: Programing bootloader into nandflash using imx27

shinengsong — Mon, 03 Jun 2013 10:51:17 GMT

Hi Yuri:

Thank you very much!

Please refer the attached file"IMX27V020427B.PDF"and "IMX27 signal test report".

It is improper of the nand flash.beacause K9F2G08U0A-PIB0'power

is 3V3, but"NVDD 1-4" of imx27 is 1V8.,

Although i changed a new one "K9F2G08R0A-JIB0",PCBA isn't working.

I guessed It's maybe some mistake in the schematic.so your idea is

very important to me.

Re: Programing bootloader into nandflash using imx27

shinengsong — Mon, 03 Jun 2013 10:55:40 GMT

Hi Yuri:
As for 32khz,the crystal is 32.768KHZ,but measured frenquency is 195KHZ.

Re: Programing bootloader into nandflash using imx27

Yuri — Tue, 04 Jun 2013 04:56:41 GMT

As for 195 KHz - please check crystal connection, using manufacturer recommendations.

Maybe a PCB issue takes place.

Re: Programing bootloader into nandflash using imx27

shinengsong — Tue, 04 Jun 2013 05:50:30 GMT

Hi Yuri:
The 32KHZ issue have been solved,,but mistake "Connection error. Please reset the board and make sure the board in bootstrap mode."is still existent.