VF6 and 8bit-NAND Flash memory

[george]

Hi all,

I wish to connect VF6 series and 8bit-NAND of Vybrid.

However, it is not known whether it is correct to use which 8 bits of NF_IO [15:0].

Is my understanding correct although it seems that NF_IO [7:0] is correct?

Best Regards,

George

[naoumgitnik · Accepted solution]

Dear George,

Below are excerpts from the NAND FLASH operation descriptions:

• "This 8-bit bus acts as a multiplexed bus to transfer data, address, and instructions."
• " Bidirectional 8-bit multiplexed bus used to send data/command/address to their respective registers in the NAND flash device. The data read from the NAND flash device is also available on these lines."
• "For 16-bit devices, commands and addresses use the lower 8 bits (7:0). The upper 8 bits of the 16-bit data bus are used only during data-transfer cycles."
• Etc.

So, it is the lower 8 bits; they are always used - for both 8- and 16-bit devices.

Sincerely, Naoum Gitnik.

[george]

Thanks Naoum,

BR

Fukutomi