Description
No, you cannot use the nCEO pin as a regular I/O after configuration, when it is used in multi-device configuration mode.
For example, if there are two devices in a chain that are linked by connecting nCEO to nCE, then the nCEO pin on the first device must be set as "Use as Programming pin" in the Dual Purpose Pins settings dialog box in the Quartus® II software.
Resolution
N/A