Author: BushraH_91 Version: **
Will RY/BY# pin on Cypress Parallel NOR Flash Memory cause any problem if left unconnected?
No, there will not be any problem if RY/BY# pin is left unconnected. The RY/BY# is an open-drain output pin that indicates whether an embedded operation is in progress. The RY/BY# status is valid after the rising edge of the final WE# pulse in the command sequence. Because RY/BY# is an open-drain output, several RY/BY# pins can be tied together in parallel with a pull-up resistor to Vcc. This feature allows the host system to detect when data is ready to be read by simply monitoring the RY/BY# pin, which is a dedicated output.