Hi, all,
I have a good customer who produces fire detection and control equipment. I'm doing a new product line for them that uses low cost analogue sensor boards connected via Displayport cables with a concentrator unit that has the ADC, control, and communications functions for up to 6 sensors.
Displayport cables have a lot of bang for the buck, but they don't have quite enough lanes for my purposes, so I'm trying to save pins.
Because there are a few different types of sensor boards, I need the concentrator to be able to identify what's connected to each DP position. One natural way of doing this is to put an EEPROM on each sensor board, and that lets me put version number and a bit of calibration data and stuff there as well.
I only have one wire available, though, so the Microchip 11A020T 256x8 looks attractive.
Before I design the thing in, does anybody here have relevant experience to share? What's the best way to talk to it? I'm okay going pretty slowly (say 10 kHz clock rate).
Thanks
Phil Hobbs