| ??? 02/23/06 12:09 Read: times |
#110575 - Xilinx stuff Responding to: ???'s previous message |
As mentioned by Jan, the main difference is the logic blocks - in fpgas they tend to be finer grained. The Xilinx 9500 series are really just PALS/GALS with interconnects. Each logic block is a 32 input AND/OR (sum of products) array whereas in fpga offering you have a sram based look-up table (LUT) which only has a couple of inputs - thus the difference in 'grainy-ness'. Fpgas haven't always been sram based, it just that everyone figured that Xilinx was on the right track. One would probably use a CPLD for glue logic, whereas a fpga would be used for more serious logic. Due to the grainy-ness of CPLDs, they tend to get a little wasteful of the silicon area. |
| Topic | Author | Date |
| FPGA/CPLD | 01/01/70 00:00 | |
| differences | 01/01/70 00:00 | |
| SRAM | 01/01/70 00:00 | |
| you don't | 01/01/70 00:00 | |
| Security | 01/01/70 00:00 | |
FPGA's were MMI's also ... | 01/01/70 00:00 | |
| copying | 01/01/70 00:00 | |
| Re: comparison | 01/01/70 00:00 | |
| Incorrect? | 01/01/70 00:00 | |
| No, however... | 01/01/70 00:00 | |
| about FPGA in 8052? | 01/01/70 00:00 | |
| In a way yes. | 01/01/70 00:00 | |
| i heard | 01/01/70 00:00 | |
| Low cost | 01/01/70 00:00 | |
| FPGA vs microcontroller | 01/01/70 00:00 | |
| Not necessarily | 01/01/70 00:00 | |
| You know it makes sense! | 01/01/70 00:00 | |
| yeah well | 01/01/70 00:00 | |
| Xilinx stuff | 01/01/70 00:00 | |
| Flash based | 01/01/70 00:00 | |
| Basic logic elements differ | 01/01/70 00:00 | |
| It seems... | 01/01/70 00:00 | |
| Consensus | 01/01/70 00:00 | |
| practical consequence | 01/01/70 00:00 | |
| Jan, Try reading this post | 01/01/70 00:00 |