I have a large, but slow, SPI bus comprising of 8 devices. The frequency of operation is 2 MHz. As I understand, I need to ensure that the bus lines are properly terminated or reflections may cause signal integrity issues. The max. length that my signal can transfer is 1 foot over a standard ribbon cable.
One thing that I'm missing is the rise/fall times of my signal, which would actually determine if I have high frequency components in the signal requiring proper termination. I buffer the signal with a NC7WZ16 IC but was not able to find the rise/fall times in the datasheet.
How can I ensure that the bus is properly terminated to minimize reflections? The load is a CPLD in all cases.