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SAFETY/BRINGUP: HV watchdog one-shot measured pulse-to-drop, t_w = 454 +/- 3 ms

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ScottW514
2026-08-15 14:01:46 -04:00
parent 52b398e11d
commit 7319c718fe
2 changed files with 16 additions and 9 deletions
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docs/BRINGUP.md
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@@ -1447,9 +1447,11 @@ accordingly ("Automatic — AP country, else World").
chain's HV_ENABLE output** through the U24 inverter — not an input.
Active for the whole duration of any run (the window in which the
charge pump is fed and HV_ENABLE is alive), inactive at idle, and it
drops ≈0.45 s after the last charge-pump pulse (measured 2026-08-07 at
20 ms through X and Z jogs, ~70/75 samples; watchdog period measured
2026-08-15). It gates nothing anywhere — it is telemetry (`/status`
drops 454 ± 3 ms after the last charge-pump pulse (one-shot t_w measured
pulse-to-drop 2026-08-15 with `scripts/bench/cp_watchdog_timing.py`:
451.8 / 455.6 ms; feed period 199.98 ms; the pad-level jog
characterization dates from 2026-08-07, sampled at 20 ms through X and
Z jogs, ~70/75 samples). It gates nothing anywhere — it is telemetry (`/status`
`switches.hv_enable`, control-panel "HV enable"). Naming note: the
factory design labels this net **E-STOP**, and dated entries below
written before 2026-08-15 call it `estop`/`SW_ESTOP` with the