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Altera_Forum's avatar
Altera_Forum
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15 years ago

NIOS is generating Read Signal Twice.

Hi, There is a custom interface of NIOS with a device, having own DSP-Processor. Interface is 16-bit data bus. While reading the data NIOS is generating CSn and RD Enable twice. Please hel...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Hi,

this is a flaw in the SOPC builder. The NIOS data master is a 32 Bit master. So accesses are always 32 bit, even if you do a 16 bit access. With 8 bit components it is even worse. The first or seond access to your 16 bit component (depending on the address) will have both byte enables disabled.