[心得] ASIC 與 FPGA Gate Count數的轉換

[kevin695 (KG and C's)]

from:http://blog.ednchina.com/lamsam/198416/message.aspx

由2顆pmos和2顆nmos組成得數位邏輯門被定義為一個gate count;
通常1個nand2被認為是一個gate count.


以 xilinx 來說  :

1 Look-Up Tables=  3 ASIC gates
1 flip-flop = 6 ASIC gates
Carry Logic + FMUX = 1 ASIC gates.
1 Logic cell = 10 ASIC gates

for example :

xc2v1000 fg456  所代表的意義

xc ---> xilinx chip
2v ---> virtex2 family
1000 --> xilinx system gate   ===  1000K xilinx system gate  == 100萬 xilinx
system gate == 100萬/8 asic gate
fg456 ---> IC 包裝

一般來說
1個xilinx 的 logic cell == 1個 Altera 的 LE

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