GoXLR-Mini.Possible to extract this firmware? Or find its datasheet?

[Coldblackice]

I'm trying to extract firmware from a GoXLR-Mini

https://www.tc-helicon.com/product.html?modelCode=P0DI7

I know it's not ideal, but I'm trying to extract the 64MB firmware without removing the chip. I've done this before, but I realize it's a case-by-case thing. Unfortunately, it seems this board's layout results in it getting powered by my SPI tool (Buspirate), failing extraction.

I believe the issue is the flash chip's HOLD pin unable to get pulled high, as the current for that pin dissipates elsewhere in the circuit. When I try to pull the HOLD pin high, a small LED beside the processor dimly lights (even with the 3.3v unconnected).

As I've researched, I found an old thread where someone mentioned the possibility of keeping a CPU in reset possibly working? So I started searching for this processor's datasheet, but I've only been able to find a basic summary datasheet, no pinouts or schematics.

For reference, the chip is a TCD3020-CG

Would it be possible to dump the firmware from this chip if I'm able to find a way to keep the CPU pulled in reset? TIA

[Khron]

Re: GoXLR-Mini.Possible to extract this firmware? Or find its datasheet?

Why necessarily without removing the firmware chip? It's not even a pain-in-the-rear DFN package. Those 8-pin SOIC you can even remove and resolder with a soldering iron.