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Altera_Forum
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8 years ago

Effect of nCE (Chip Enable)

Does nCE=High only disable the Configuration pins or would other pins also be affected? And does "disable" imply that the affected pins are high impedance? What happens if nCE is driven high in...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Yes, taking nCE high tristates all configuration pins on the FPGA side, so that you can e.g. reprogram the AS memory. The pins are not generally tristated in user mode, the altasmi IP is even clocking DCLK permanently.

There's no need for buffers between AS memory and FPGA, just control nCE respectively.