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| nick_ | Would anyone be able to point me towards documentation about the timing specs of ICE40HX parts? | 12:59 |
|---|---|---|
| daveshah | The raw data is https://github.com/YosysHQ/icestorm/blob/master/icefuzz/timings_hx8k.txt | 13:01 |
| daveshah | With the Makefile in that folder you can also create a HTML version of that file that's a bit more readable | 13:01 |
| nick_ | Thanks | 13:02 |
| nick_ | Do you know where the data comes from? | 13:02 |
| nick_ | Was it from testing devices, or some other docs? | 13:03 |
| daveshah | It comes from parsing sdf files generated by icecube | 13:03 |
| daveshah | In practice, those numbers are very conservative and actual performance at room temp will be quite a bit faster | 13:04 |
| nick_ | OK | 13:04 |
| nick_ | I'm not too worried about absolute values, but in comparing some timings. | 13:04 |
| nick_ | Like how much faster the carry chain is than going through LUTs | 13:05 |
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| corecode | daveshah: you think it is possible that the ice5lp1k don't have the additional (to 4k) bram accessible? | 17:20 |
| daveshah | It's theoretically possible, but also unlikely, imo | 17:21 |
| corecode | daveshah: or is it possible that i made a mistake in the port, and even the 4k chip wouldn't work | 17:21 |
| daveshah | Thats also possible | 17:21 |
| corecode | my mistakes are likely | 17:22 |
| corecode | i wonder how to test this without a 4k chip | 17:23 |
| daveshah | Create a design with all the ram in icecube and see if icebox_vlog reports anything suspicious? | 17:25 |
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