NOR boot - Muxed mode (AM335X)

Sankar S

Can you please let me know, in MUXED mode, for NOR boot, as such the ROM code will have access to how many Address lines and How much of size of NOR flash?

As per the TRM it says AD0 to AD15, does that mean 64Kilo Bytes?

over 12 years ago

0 Biser Gatchev-XID over 12 years ago

TI__Guru**** 393215 points

Check section 26.1.7.2.2 in the TRM. A12 to A27 are not initialized by the ROM code.

0 Sankar S over 12 years ago in reply to Biser Gatchev-XID

Intellectual 405 points

In that section, it is mentioned that from A16 above for the Muxed mode. Is that correct? The ROM code can access upto A15 address lines in muxed mode. Right???

From TRM 26.1.7.2.2 Pins Used

"Similarly for Muxed NOR Boot, address lines A16 and above to the memory
are not controlled by the ROM and need to be managed externally during boot to ensure proper
addressing to the all memory signals"

0 Biser Gatchev-XID over 12 years ago in reply to Sankar S

TI__Guru**** 393215 points

Yes, you are correct. Sorry, my error, didn't read to the end.

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NOR boot - Muxed mode (AM335X)