| T01 | VCC Rail (post-diode) | rail_voltage | VCC | TP1 | 4.2 – 4.85 | V | high |
| T02 | +3.3V Regulated Rail | rail_voltage | +3.3V | TP2 | 3.135 – 3.465 | V | high |
| T03 | Ground Reference (digital core) | rail_voltage | GND | TP7 | -0.05 – 0.05 | V | medium |
| T04 | Ground Reference (crystal/QSPI zone) | rail_voltage | GND | TP14 | -0.05 – 0.05 | V | medium |
| T05 | Total Supply Current (VBUS) | current | VBUS | J1.A4 (USB-C VBUS pad) | 8 – 45 | mA | medium |
| T06 | Xin Oscillator Node DC Bias | io | /Xin | TP3 | 0.3 – 3 | V | low |
| T07 | XoutR Oscillator Node DC Bias | io | /XoutR | TP4 | 0.3 – 3 | V | low |
| T08 | SWCLK Debug Line Continuity | firmware | /SWCLK | TP5 | 0 – 3.465 | V | high |
| T09 | SWDIO Debug Line Continuity | firmware | /SWD | TP6 | 0 – 3.465 | V | high |
| T10 | QSPI_SS Logic Level | io | /QSPI_SS | TP8 | 2.64 – 3.63 | V | high |
| T11 | QSPI_SCLK Idle/Toggle Level | io | /QSPI_SCLK | TP9 | 0 – 3.63 | V | high |
| T12 | QSPI_SD0 Logic Level | io | /QSPI_SD0 | TP10 | 0 – 3.63 | V | high |
| T13 | QSPI_SD1 Logic Level | io | /QSPI_SD1 | TP11 | 0 – 3.63 | V | high |
| T14 | QSPI_SD2 Logic Level | io | /QSPI_SD2 | TP12 | 0 – 3.63 | V | high |
| T15 | QSPI_SD3 Logic Level | io | /QSPI_SD3 | TP13 | 0 – 3.63 | V | high |
| T16 | USB Enumeration (CDC) | comms | USB_DP/DM | J1 (USB-C, D+/D-) | 0 – 2 | s | high |
| T17 | GET_VERSION Firmware Response | firmware | USB_CDC | J1 (USB-C, CDC serial) | 0 – 500 | ms | medium |
