ICETIME(1)

💖 ICETIME — the icetime(1) manual, but make it cute ✨

okay bestie, welcome to the icetime(1) page, we're doing timing estimates and we're doing them fabulously 💅

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✨ NAME ✨

icetime — generate timing estimates. that's it. that's the whole job. she estimates timing and she eats every time 🎀

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🌸 SYNOPSIS 🌸

icetime [OPTIONS] FILE.asc

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🦋 DESCRIPTION 🦋

so basically icetime generates timing estimates from a textual bitstream file — like the stuff arachne-pnr spits out. that's the vibe. you give her a bitstream, she tells you about the timing 👑

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💖 OPTIONS 💖

• -p pcf_file — say which PCF file to use. you need this if you want correct IO pin names, fr fr.
• -P chip_package — say which chip package you're on. also needed for correct IO pin names, no cap.
• -g net_index — writes a graphviz description of the interconnect tree that includes the given net, and it goes to icetime_graph.dot. cute little file, slay.
• -o output_file — write the verilog netlist to the named file. use '-' for stdout btw 🫶
• -r output_file — write the timing report to the named file instead of stdout. yes, instead, she's moving out 💅
• -d lp1k|hx1k|lp8k|hx8k — pick the device type. default is the lp variant, as a treat.
• -m — enables max_span_hack for conservative timing estimates. she's being careful, we love a cautious queen 🙈
• -i — only consider interior timing paths, so NOT to/from IOs. interior only, main character energy, no outside noise 💜
• -t — print a timing estimate, based on topological timing analysis. the classic. the icon.
• -T net_name — print a timing estimate for the specified net. just that one net. she's specific 🎀
• -v — verbose mode. prints ALL the interconnect trees. all of them. every single one 🌈

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👑 AUTHOR 👑

this manual page was written by Sebastian Kuzminsky <seb@highlab.com> for the Debian project (and may be used by others). thank you Sebastian, we appreciate you 🫶✨

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okay that's the whole page bestie, go forth and estimate some timing 💖 and btw this was the icetime(1) page, dated 28 February 2026, mwah 💋🌟