AM437x SYSBOOT[11] setting for NAND boot

j-breeze

Hi Champs,

One of my customers said that AM437x NAND boot requires setting SYSBOOT[11] to 0b.
Have you heard of the related information?

I'm sorry but I can't make sure of it because I don't have TMDS version of AM437x GP EVM that support NAND boot mode.

Thank you in advance for your cooperation.

Beat regards,
j-breeze

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

Per AM437x TRM Rev. D, Table 5-10 SYSBOOT[11] should be "don't care" for NAND boot. However Table 9-59 states that bitfield MUXADDDATA in GPMC_CONFIG1_0 is set based on SYSBOOT[11] and SYSBOOT[10] at reset release time. SYSBOOT[10] should always be set to 0 for normal operation. SYSBOOT[10] = 1 is reserved. How is this bit set in your customer's board?

0 j-breeze over 9 years ago in reply to Biser Gatchev-XID

Mastermind 7560 points

Hi Biser,

My customer sets SYSBOOT[10] to 0b.

By the way, according to AM437x TRM Rev. D, the MUXADDDATA bit field should be set to 00 to select a NAND device.
So, I think that SYSBOOT[11] should be set to 0, not "don't care" for NAND boot. Is that right?

o AM437x TRM [SPRUHL7D]

- Page 1128

      9.1.3.3.7.1 GPMC I/O Configuration Setting

        To select a NAND device, program the following register fields:
        ･ GPMC_CONFIG1_i[9-8] MUXADDDATA bit = 00

Best regards,
j-breeze