Why ibl in eeprom boot need too much time on evm6678l?

yinghui ji

We test that the ibl in eeprom boot will need 20 more seconds on evm6678l. The time tested between the power on and the eeprom is boot over. I can't understand why it takes too much time? I test both in 20KHz mode and 400KHz mode, it seems that there is no difference. I think the time is unexcceptable. My question is :

1. Can we shorten the boot time? And how?

2. We test that during ibl boot , there are three kind of I2c clock frequency, 20KHz, 8kHz, and 80KHz. What's the reason for the different clock frequencies. Why there are no difference between 20KHz and 400KHz as I mentioned above?

3 Supposed that the ibl in eeprom boot can't shorten greatly. Can I put the ibl in spi nor flash, and how?

Thank you for our help.

over 13 years ago

0 Chad Courtney over 13 years ago

TI__Mastermind 30825 points

Yinghui,

What are the switch settings on the EVM? By default the switch settings are setup to do the OOB (Out of box) Demo. The IBL will execute then jump to flash and load the OOB Demo.

I'll ping another TIer that knows a bit more about the code on the EVM, but it doesn't take 20s to execute the PLL workaround and jump to the entry pointer.

Best Regards,

Chad

0 RandyP over 13 years ago in reply to Chad Courtney

TI__Guru* 84110 points

Yinghui,

Another question while Chad is referring your question:

What condition or display do you use to measure the end of EEPROM boot?

Regards,
RandyP

0 yinghui ji over 13 years ago in reply to RandyP

Prodigy 120 points

Thanks for your help. I use tftp boot currently. When the evm power on, i take the time. I take another time when the I2c has no signal. Can you give me your test result and method?

0 RandyP over 13 years ago in reply to yinghui ji

TI__Guru* 84110 points

Please list all your switch and jumper settings.

0 RandyP over 13 years ago in reply to RandyP

TI__Guru* 84110 points

Yinghui,

What is your EVM board revision? It will be on the bottom side of the board and will be something like A-101 or A-102 or similar.

Regards,
RandyP

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Why ibl in eeprom boot need too much time on evm6678l?