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Altera_Forum's avatar
Altera_Forum
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17 years ago

32-bit SSRAM must have byteenable for Nios II?

One question - For 32-bit external SSRAM (or async. SRAM), does it have to have byte write mode enabled in order to work with Nios II processor? In other words, can Nios II handle all instruct...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I know it's a bit old thread but still... Byteenable's for NIOS are important if you're using EPCS or equivalent device to boot FPGA and SW code. Since Flash devices(serial) are usually 8 bit wide, the bootloader packs the SSRAM using byte enables... so if you don't have them connected or misconnected the processor will fail to run although the FPGA boots correctly.