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@@ -311,6 +311,26 @@ makes it easy to install them side-by-side with the regular riscv-tools, which are using the name prefix `riscv64-unknown-elf-` by default. +Evaluation: Timing on Xilinx 7-Series FPGAs +------------------------------------------- + +The following table lists the maximum clock speeds that PicoRV32 can run at on +Xilinx 7-Series FPGAs. This are the values reported by Vivado 2015.1 post +place&route static timing analysis (report_timing). + +| Device | Speedgrade | Clock Period (Freq.) | +|:-------------------- |:----------:| --------------------:| +| Xilinx Artix-7T | -1 | 5.1 ns (196 MHz) | +| Xilinx Artix-7T | -2 | 4.1 ns (243 MHz) | +| Xilinx Artix-7T | -3 | 3.6 ns (277 MHz) | +| Xilinx Kintex-7T | -1 | 3.3 ns (303 MHz) | +| Xilinx Kintex-7T | -2 | 2.6 ns (384 MHz) | +| Xilinx Kintex-7T | -3 | 2.5 ns (400 MHz) | +| Xilinx Virtex-7T | -1 | 3.1 ns (322 MHz) | +| Xilinx Virtex-7T | -2 | 2.6 ns (384 MHz) | +| Xilinx Virtex-7T | -3 | 2.4 ns (416 MHz) | + + Todos: ------ |