I am designing an SPI system with one master and two slaves. In a normal SPI system, the master needs 2 outputs to control the slaves' chip select lines. I want to use only one output to drive both chip selects thanks to a classic NOT gate.
I haven't tried this yet because I see one issue:
- When the master command comes from HIGH to LOW, both chips will be selected for a short time due to the NOT gate delay.
Can this issue cause an overall problem?
For this easy scenario, a "not" gate does the job, what is commonly used when there are many more slaves? MUX?