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Altera_Forum
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12 years ago

Need help to implement 2D array ROM in vhdl

Hi, I wanna implement 16x16 array. each entry in that 2D array will be of 8 bit. so I wrote this. TYPE SBOX is array (15 downto 0, 15 downto 0) of std_logic_vector(7 downto 0); // is this...
Altera_Forum's avatar
Altera_Forum
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12 years ago

You shouldn't create a 2d array like this if you want to infer altera ram. You need to make a 1d array and then concatenate the 4bit row and column addresses to make a single 8 bit address.