mattthebaker
Joined 13 years ago
Joined 13 years ago
You don't need a very accurate clock (quartz) for ~100 Mhz SPI. A ring oscillator is just a chain of inverters. If you want to match the bus frequency accurately you can train a PLL against the signal clock.
Not sure what the point is about the pullup, to flip the bit you need only to overpower the output buffers of the other chip.
Cramming it all in a 0402 would be a stretch but I could see it being possible with the right resources. Having only 2 pins would be pretty useless if you can't snoop the address though. And modern NOR devices on a motherboard is almost certainly using the high speed 4 pin serial interface rather than standard SPI.
I had worked on one of the last TLC NAND designs before the transition to 3D. You could only afford to leak 1 electron per year to meet the data retention spec... TLC did not make it market on that process/node.
Homelessness -- multiple per block
Excrement -- every other block
Public drug use (non pot) -- every other day
Public urination -- once per week
Public defecation -- once per month
I was assaulted at the street corner near our office once in the 1.5 years we were there.
My guess is that the homeless population is just too large to manage any reasonable degree of cleanliness.