I don't have the serial cable. Is it's 3.3V or 1.8V? I was going to pick up a 1.8V TTL cable because I wanted to do something with my Kindle Voyage, but I haven't ordered it yet so I could try to find one that has a multiple voltage select.
Here's my Rev E blob:
https://1drv.ms/u/c/1b1908eb94064033...eGPQg?e=NBWxzR