Yes. The clearest one is **[U1](https://www.flux.ai/:handle/:documentSlug?fit=U1) pin `VDDA_PLL`**. ### U1 pins that look wrong or risky | Pin on [U1](https://www.flux.ai/:handle/:documentSlug?fit=U1) | Net | Netlist observation | Datasheet evidence | Verdict | |---|---|---|---|---| | `VDDA_PLL` | `Net 110` | Connected only to local RC/filter parts, but **not to a driven power rail**. ERC also reports **“Power input not driven: U1:VDDA_PLL”**. | Datasheet pin listing identifies `VDDA_PLL` as **PLL Analog VDD Supply**. That means it is a supply pin, not a leave-floating signal. | **Should be connected** to the PLL analog supply source. | | `TEST2` | `Net 28` | **Only [U1](https://www.flux.ai/:handle/:documentSlug?fit=U1):TEST2** is on this net, so it is floating. | Datasheet snippet states: **“The state of the TEST1, TEST2, and nRESETIN signals determines the operating mode entered at Power-on Reset.”** A mode-select pin must not float. | **Should not be left floating.** It needs a defined level per the datasheet’s boot/test-mode requirements. | | `TEST1` | `Net 29` | Not floating internally, but it only goes off-chip and I do not see any local pull-up/pull-down ensuring a default state. | Same datasheet statement as above: `TEST1`, `TEST2`, and `nRESETIN` determine startup mode. | **Potential issue** if the external source can ever float during reset. | | Various muxed GPIO / LCD / ADC pins such as `PB2/nCS3`, `PE5/SSPRX`, `PG0/LCDPS`, `PG1/LCDCLS`, `PG2/LCDDSPLEN/LCDREV`, `PG4/LCDVEEEN/LCDMOD`, `AN6/PJ1`, `AN8/PJ3`, `AN9/PJ5`, `AN4/PJ6`, `PF4/...`, `PD1/INT1` | single-pin nets | These appear intentionally unused in the current netlist. | For multifunction I/O, whether they “should” be tied depends on how firmware configures them. | **Not automatically wrong**, but worth checking against the datasheet’s unused-input guidance. | ### Bottom line - **Definitely fix:** `VDDA_PLL` - **Very likely fix:** `TEST2` - **Review carefully:** `TEST1` startup biasing - The other single-pin multifunction I/Os are **not necessarily errors**; they may be intentionally unused. If you want, I can do a second pass and produce a **complete list of every [U1](https://www.flux.ai/:handle/:documentSlug?fit=U1) pin on a one-pin net**, grouped into: - definitely must connect - should be biased - safe to leave unused depending on firmware