I have downloaded a full info datasheet of ATS250x processor, and hopefully it shows an SPI interface. It contains SPI MISO, MOSI, CLK and SS (CBS I suppose). They are located at the end of the left side of the processor. I have found the info in the web to build an SPI programmer thru LPT port, it is very easy to build, with an 25 pin LPT male connector and some resistances. The goal is to read the firmaware of a working device from SPI pins and then burn it in my dead unit. The pins are very small and solder skill is a must. I have a program that cam read from SPI pin the firmware, but is made to read from SPI of a bluetooth module made from CSR. I donīt know if it Works or not, only a try will answer that question. The SPI programmer is this:
http://3.bp.blogspot.com/-txoUBJNqeC.../s1600/spi.jpg