Neat! I made a battery powered hand-held computer using IDT's MIPS R3041 long ago (1996 or so). It was nice because you could use gcc to cross-compile for it in Linux. My computer also used a Xilinx FPGA. The CPU was not particularly low power, but the FPGA was pretty good. So the CPU was powered off between key-presses- each time you hit a key it went through the entire reset process. I discovered that the external crystal oscillator also used a lot of power, so had to be powered off also.
Anyway, I'm curious what they use for glue logic on New Horizons. I certainly would not use an FPGA: too SEU sensitive.
Anyway, I'm curious what they use for glue logic on New Horizons. I certainly would not use an FPGA: too SEU sensitive.