Connecting NAND flash MT29F4G16ABADAWP to RM48L952ZWT and ETM capabilities

Ubaid Mahmood

Hello,

We are looking to connect a 4Gbit NAND flash MT29F4G16ABADAWP to RM48L952ZWT. Can you confirm the following connections are needed?

· CLE à EMIF_ADDR[7] or one GPIO pin

· ALE à EMIF_ADDR[6] or one GPIO pin

· WE# à EMIF_nWE

· RE# à EMIF_nOE

· CE# à EMIF_ADDR[8] or one GPIO pin

· R/B# à one GPIO pin

· I/O[7:0] à EMIF_DATA[7:0]

· WP# à Customer’s decision to use it

Questions:

1) Is the above connections appropriate to connect to the NAND flash?

2) Is there a scenario we need to use EMIF_nCS[0]? vs using the NAND's CE#?

3) With the configuration above, it appears ETMDATA[11:8] pins will not conflict with EMIF pins EMIF_ADDR[5:2]. Will we then safely have 12 data pins dedicated for ETM?

Thanks.

Ubaid

over 10 years ago

0 Sunil Oak over 10 years ago

TI__Mastermind 49120 points

Hello,

Interfacing a NAND flash memory is not supported on the RM48x MCUs.

Regards,
Sunil

0 Ubaid Mahmood over 10 years ago in reply to Sunil Oak

Intellectual 970 points

Hello Sunil,

Another TI rep Anthony Seely, mentioned it can be done n the following thread: http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/390704.

Also, FAE from Arrow indicated it could be done as well.

Did they provide us the wrong information? or I misunderstood something?

Thanks.
Ubaid

0 Sunil Oak over 10 years ago in reply to Ubaid Mahmood

TI__Mastermind 49120 points

Hello Ubaid,

I checked with Anthony again, and yes, you can interface to NAND flash via EMIF. Sorry for the confusion on my part.

A typical connection to an 8-bit NAND flash is shown below:

You can use EMIF chip-select 2, 3, or 4 for this interface. The signals shown above are:

EMIF_ADDR[12], EMIF_ADDR[11], EMIF_nCS[2], EMIF_nWE, ETMDATA[13]/EMIF_nOE, ETMDATA[23:16]/EMIF_DATA[7:0], and EMIF_nWAIT

So that still leaves ETMDATA[12:0] available for CPU trace.

Regards,

Sunil

0 Ubaid Mahmood over 10 years ago in reply to Sunil Oak

Intellectual 970 points

Thanks Sunil,

Instead of using EM_A[12] and EM_A[11] to connect to ALE, and CLE respectively, we can also use EM_A[6] and EM_A[7] and still have ETMDATA[12:0], correct? Is this correct?

Thanks.
Ubaid

0 Sunil Oak over 10 years ago in reply to Ubaid Mahmood

TI__Mastermind 49120 points

Hi Ubaid,

Sorry missed this question in your post. Yes, you can also use EM_A[6, 7] for the ALE, CLE signals.

Regards,
Sunil

0 Ubaid Mahmood over 10 years ago in reply to Sunil Oak

Intellectual 970 points

Thanks!

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Connecting NAND flash MT29F4G16ABADAWP to RM48L952ZWT and ETM capabilities