LS1046A IFC Interface NAND

[jvbentley93]

Hello,

Question about the interfacing NAND with IFC.

We are planning to boot from QSPI which takes up one of the WP# pins. 

We are also going to be using a large NAND part with has two WP# signals, four RB# signals, and four CS# signals.

1)Can I wire-OR the two WP# signals from the NAND module to the single WP0# pin on the LS1046A?

2a) The NAND part has 4x RB# signals. Can I wire-OR all 4 RB# signals coming from the NAND to the single RB0# pin on the 1046?

2b) Alternatively, can I individually wire the 4x RB# signals from the NAND to four individual IRQ pins on the 1046 and somehow use that with the IFC interface (that is, have the IFC interface somehow read the state of the relevant IRQ pins that has the RB# signals on it?)

Thanks

[SebastianG]

Apologies for the late response,

Could you please tell me which Nand are you using for this purpose?

Are you using  a custom board or a RDB?

Regards

[jvbentley93]

I am designing a custom board right now. 

That NAND part is want to use is the MT29F256G08AUCABH3 from Micron.

[SebastianG]

Hi @jvbentley93,

You can follow the LS1046A checklist in order to see how connect the NAND to the IFC

The design checklist is in the following link:

https://www.nxp.com/docs/en/application-note/AN5252.pdf

Regards

[goodwillj]

Hi @SebastianG ,

The checklist isn't clear on pin D11, which is multiplexed as either QSPI_A_DATA0 or IFC_WP1_B. In order to  boot from QSPI, we need to use QSPI_A_DATA0, which means we cannot use IFC_WP1_B. All reference boards only use one NAND IC. For using multiple NAND ICs with multiple CS, are there any suggestions on how to wire the WP line since it can't be used from D11?

Thank you. 

[SebastianG]

Hi @goodwillj,

Apologies for the delayed response,

unfortunately if you use the pin D11 AS QSPI_A_DATA0, you can't use another function in this pin,

However you can use the pin C12 for use IFC_WP2_B

Regards

[SebastianG]

Hi @jvbentley93,

I am already working on your question, when I have any update I will let you know