From d393e0c30192611d4cac65a5429fd7180ce1f49c Mon Sep 17 00:00:00 2001 From: "info@mode42.com" Date: Fri, 7 Aug 2026 18:15:00 +0000 Subject: Initial push --- docs/POWER.md | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 docs/POWER.md (limited to 'docs/POWER.md') diff --git a/docs/POWER.md b/docs/POWER.md new file mode 100644 index 0000000..78e2f54 --- /dev/null +++ b/docs/POWER.md @@ -0,0 +1,12 @@ +# Power — T-Modem-c1224 + +| Net / path | Role | +|------------|------| +| `VIN_12` | Barrel jack **5.5×2.1** centre-**positive** | +| `U_REG` | Buck **12 V → 5 V** (Mini560 5 V class / MP1584-class on headers) | +| `+5V` / `+5V_REG` | Board rail after buck (+ optional series PTC) | +| `GND` | Common ground | +| USB `VBUS` | **Isolated** — **DNI** OR diode · **no** feed into 5 V rail | +| USB D+/D− / GND | Flash + CDC command path to Pico · LCD service via Pico | + +Pico **VSYS/VBUS pin on headers** is fed from the **board 5 V rail**, not from the Type-A receptacle VBUS. -- cgit v1.3.1