Booting a X66AK2E05 in 'Min' NAND mode.

Richard Yearsley

Hello,

I'd like to free-up some GPIOs on my X66AK2E05 design by setting the MIN bit in the DEVSTAT register and, although it appears to work fine on my prototype, I can't find anything in the documentation to confirm what SYS PLL setting is being used in this state.

I'm using a NAND boot device, so I'm setting-up my BOOTMODE pins to make DEVSTAT [4:0] = 10111

The datasheet (SPRS864D page 137) states that ' Default values are assigned' when MIN=1 but apart from the CLEAR bit, there are no default values given for the other bit-fields.

Could you tell me what the SYS PLL field defaults to in MIN mode?

Regards,

Richard

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi Richard,
We are working with factory team to get the information. We request your patience here. Thank you.

0 Rahul Prabhu over 10 years ago

TI__Guru** 116170 points

Hi Richard,

Here are the default parameters for NAND boot mode for K2E devices.

The SYS PLL config will be set to 156.25Mhz setting (value corresponding to 4 in Table 9-25). Please let us know if you still need any more information.

Regards,

Rahul

0 Richard Yearsley over 10 years ago in reply to Rahul Prabhu

Prodigy 210 points

Thank you for the information.

It looks like I will have to use all of the BOOTMODE pins since I have a 100MHz SYS CLK and need the SYS PLL to be 3 instead of 4.

P.S. I will click the 'Verify Answer' button once it appears. I can't see anywhere using Firefox or IE.

0 Richard Yearsley over 10 years ago in reply to Richard Yearsley

Prodigy 210 points

Just to confirm: The 'Verify Answer' button appeared only after I had replied. I've seen this happen a few times now, and it seems to be a broken feature of the forum.

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Booting a X66AK2E05 in 'Min' NAND mode.