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Altera_Forum's avatar
Altera_Forum
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17 years ago

Unable to place RAM cells in design

Hi folks, I'm trying to work on an SoPC design. I've used my architecture as an IP and inserted it onto the SoPC having Nios II CPU, jtag-uart, interval timer, on chip memory, and a pio. I'm try...
Altera_Forum's avatar
Altera_Forum
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17 years ago

seems to me that each of the 32 dprams should only use 1 M4K.

http://www.altera.com/literature/hb/cyc2/cyc2_cii5v1_03.pdf shows that the M4K can be configured to 4K x 1. It also show that the EP2C20 has 52 M4Ks. This would make me assume that the rest of the system is using the other 233 M4Ks(error message says cannot fit 265 RAM CELLS... 265 - 32(from the IP) = 233). What is the size of the on chip memory? Are there multiple instances of your custom IP?