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Configure FT2232H using dual eeprom

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shahulakthar:
I want to connect dual eeprom to configure ft2232h.

eeprom1 which configure ft2232h ch1-jtag and ch2-uart.
eeprom2 which configure ft2232h with ch1-uart and ch2-fifo

First eeprom data is for programming controller via jtag.
second eeprom data is for uart and fifo communication with controller.

To achieve this ft2232h clock and cs lines are shared between eeprom.
for data line jumper to select between eeprom1 or eeprom2 to eedata.

is it possible to achive by this method?

Do i need to reset or power off/on every time to configure from another eeprom

Schematic attached

Thanks

FTDI Community:
Hello,

Unfortunately this is not something that has been done before.

We only ever recommend to connect one EEPROM as per the datasheet.

There may be other FTDI community users who have done this and may be able to help you.

In any case, the device would need to be reset or power cycled to allow for the EEPROM contents to be read and applied.

You may be safer to use a multi-chip solution.

Best Regards,
FTDI Community

shahulakthar:
Hi,

Thanks for your reply.

I hope there will be some FDTI users did this.

Mutli chip solution take more board space. that is also a concern.

Also want to know is there any application note to help with USB hub support for mutichip solution.

Like accessing 2 FT2232h ic via single USB port.

FTDI Community:
Hello,

The FT4232HL / FT4232HQ / FT4232H-56Q is a four port device which we have but unfortunately it doesn't provide USB to FIFO.

You may want to consider the FT232HQ / FT232HL for a multi-chip solution.

Unfortunately FTDI to do manufacture any USB Hub ICs so we have no application notes available on this.

You can check with USB Hub IC manufacturers.

Best Regards,
FTDI Community

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