ali8
Member level 2

Hello,
I understand that Xilinx FPGAs comes in different speed grade. I am considering Spartan 6 speed grade 3.
How can I know what Mhz does this -3 corresponds to?
I have read the DC and Switching Characteristics (https://www.xilinx.com/support/documentation/data_sheets/ds162.pdf) but not able to find out.
For example, the DSP48A1 has a switching speed of 390 MHz. But what about the slices themselves?
If I am implementing some logic circuit, what is the speed that I can operate it on? I know this has also to do with the speed of the RAM, I/O, etc, but I mean like in a PC, we have specific speed for the CPU (e.g. 2 GHz).
I understand that Xilinx FPGAs comes in different speed grade. I am considering Spartan 6 speed grade 3.
How can I know what Mhz does this -3 corresponds to?
I have read the DC and Switching Characteristics (https://www.xilinx.com/support/documentation/data_sheets/ds162.pdf) but not able to find out.
For example, the DSP48A1 has a switching speed of 390 MHz. But what about the slices themselves?
If I am implementing some logic circuit, what is the speed that I can operate it on? I know this has also to do with the speed of the RAM, I/O, etc, but I mean like in a PC, we have specific speed for the CPU (e.g. 2 GHz).