Title :
A flexible LUT-based carry chain for FPGAs
Author :
Lodi, Andrea ; Chiesa, Carlo ; Campi, Fabio ; Toma, Mario
Author_Institution :
Adv. Res. Center on Electron. Syst., Bologna Univ., Italy
Abstract :
In this paper we propose a new type of carry chain designed for FPGAs, which allows good performance with a limited area occupation dedicated to the chain. The main features of our chain are full uniformity in the bidimensional tile array, as well as the absence of constraints in the operand size and in the position of any logic resource. The flexibility of this chain is such that a wide class of functions can be mapped, differently from other existing solutions designed only for adders. This carry chain has worked properly on a test chip developed by using 0.18 μm CMOS STMicroelectronics technology.
Keywords :
CMOS logic circuits; adders; carry logic; field programmable gate arrays; table lookup; 0.18 micron; CMOS STMicroelectronics technology; FPGAs; arithmetic functions; bidimensional tile array uniformity; configurable logic block; flexible LUT-based carry chain; limited area occupation; logic functions; CMOS logic circuits; CMOS technology; Degradation; Field programmable gate arrays; Hardware; Logic arrays; Routing; Table lookup; Testing; Tiles;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206209
