FT232H interface with LPC4370

[lorenz_aebi]

Hello all

we do not want to implement a custom driver on the windows side (due to timeplan reasons), but need to transfer data over USB with a datarate of ~5 MBytes/s. For this we think that the FT232H chip is a good choice. Is it possible to connect the FT232H chip to the EMC (External Memory Controller) interface of the LPC4370. We plan to have a SD-RAM as well on the EMC interface. By reading the Reference Manual of the LPC4370 it seems to be possible but what are the constraints in latency? What do you think? Does anybody already had such a configuration? Is it a problem when the SD-RAM has a 32bit databus-width and the FT232H only a 8bit databus-width?

Thanks for your comments and support

Lorenz

[Carlos_Mendoza]

Hi Lorenz,

If the FT232H has a SRAM-type interface then the EMC bus can be shared with multiple devices, such as SDRAM, NOR flash, SRAM or  otherdevices with an SRAM-type interface, you can follow the steps mentioned in the chapter 5.1 of the following application note for more information about interfacing multiple devices with the EMC module:

https://www.nxp.com/docs/en/nxp/application-notes/AN12026.pdf

Hope it helps!

Best Regards,
Carlos Mendoza
Technical Support Engineer