CMOD A7 Schematic missing stuff

[FPGAMaster]

The CMOD A7 schematic is missing some items. For example: The USB connector and associated circuitry is missing from the schematic. Only the UART connections at the are shown on sheet 3. The signals UART_TXD_IN, and UART_RXD_OUT are shown on pins J17 & J18 (Bank 14) but can not be found anywhere else in the schematic. All of the remaining USB schematic items (components, JTAG signals, etc) are missing.

Is there a complete schematic available?

 

[kwilber]

The uart and jtag circuitry is proprietary and in not shown in the schematics for most of the Digilent boards.

[FPGAMaster]

Thanks for your input. I have looked at several of the boards and see the same problem with a few of them. However, some of the documentation seems to show more information. I want to have the full schematic so I'm sure I don't "hook up" something and let the smoke out.

[D@n]

@FPGAMaster,

If you want to take a peek at what the missing pieces from the schematic (probably) look like, check out the schematic for the MAX-1000 from Trenz.  It's  got the missing USB/FTDI programmer circuitry shown, and operates in roughly the same fashion.

Dan

[xc6lx45]

FYI: The MAXX schematic shows the "standard" FTDI-JTAG connection but it is possible that your board has some additional buffers in-between. I noticed this on the CMOD A7 (not S7), needs some GPO bits set to work with custom FTDI-JTAG code. As an opinion, I don't think there's a real risk of breaking anything.

 

[FPGAMaster]

I am still looking for more details on the USB-UART. I hope there is help for this available from digilent

[jpeyron]

Hi @FPGAMaster,

The programming circuit is considered proprietary.  I have PM'd you the next step in regards to the programming circuit.

best regards,

Jon

[FPGAMaster]

Thank you Jon... I got the PM and will follow up as you suggested.

 

[Lucky]

Hello,

I have the same issue and would like to get more detail.  I have two Cmod A7-15T and would like to understand the UART and 12 MHz signals and others not shown to use as a debug port.  Can you please get me the missing schematic page or alternative documentation?

thank you

Rick