am335x 16-Bit Address/Data-Multiplexed config

fly100

hello, I am wanting to use am335x to read 16-bit Address/Data-Multiplexed nor type memory.

before I have configed 16-bit Non-multiplexed Memory successfully, now changed Address/Data-Multiplexed, what should I config for this change?

Now I have config the AD[15:0] pinmux, and config gpmc_config[1] = 0x0x00001200. anything else to config? thanks you very much!

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi,

For A/D mux mode the nADV/ALE timing is important, since this is the signal that's used to latch the address from the multiplexed bus. You can find details in section 7.1.5 from the AM335X TRM Rev. L.

0 fly100 over 11 years ago in reply to Biser Gatchev-XID

Intellectual 620 points

this is my config:
GPMC_CONFIG1_0 0x00001200
GPMC_CONFIG2_0 0x001E1F00
GPMC_CONFIG3_0 0x001F1F00
GPMC_CONFIG4_0 0x1F0BFF31
GPMC_CONFIG5_0 0x001C1F1F
GPMC_CONFIG6_0 0x8F070080
is it ok?

0 Biser Gatchev-XID over 11 years ago in reply to fly100

TI__Guru**** 393215 points

I cannot calculate your timing since I don't know what device you are connecting to the GPMC. You have to calculate the timings yourself based on the NOR datasheet and the guidelines in the TRM section I pointed above.

0 fly100 over 11 years ago in reply to Biser Gatchev-XID

Intellectual 620 points

thank you very much!

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am335x 16-Bit Address/Data-Multiplexed config