# Voltage-domain ERC — give-me-led-cube

0 error(s), 0 warning(s). Ambient 40 °C. Specs: `specs/parts/`.

## Rails (power budget)

| rail | source | V | load mA | rated mA | use | nets |
|---|---|---|---|---|---|---|
| +3V3 | U2 | 3.23..3.37 | 40.0 | 500 | 8 % | +3V3 |
| VBUS | external | 4.75..5.5 | 40.0 | - |  | VBUS |

### Loads

| rail | net | ref.pin | mA |
|---|---|---|---|
| +3V3 | +3V3 | U1.4 | 40.00 |
| VBUS | VBUS | U2.in | 40.05 |

## Thermal budget

| ref | part | P mW | basis | θJA °C/W | Tj °C | limit °C | |
|---|---|---|---|---|---|---|---|
| U1 | STM32G030F6P6 | 135 | Σ V·I_max of supply pins | 88 | 52 | 105 | ok |
| U2 | RT9013-33GB | 91 | (5.50-3.23) V x 40 mA | 250 | 63 | 125 | ok |

## Per-pin table

| ref | pin | name | type | net | V | limit | status |
|---|---|---|---|---|---|---|---|
| D1 | 1 | K | passive | GND | 0 |  | ok |
| D1 | 2 | A | passive | LED1 | 0..3.37 |  | ok |
| D2 | 1 | K | passive | GND | 0 |  | ok |
| D2 | 2 | A | passive | LED2 | 0..3.37 |  | ok |
| D3 | 1 | K | passive | GND | 0 |  | ok |
| D3 | 2 | A | passive | LED3 | 0..3.37 |  | ok |
| D4 | 1 | K | passive | GND | 0 |  | ok |
| D4 | 2 | A | passive | LED4 | 0..3.37 |  | ok |
| D5 | 1 | K | passive | GND | 0 |  | ok |
| D5 | 2 | A | passive | LED5 | 0..3.37 |  | ok |
| D6 | 1 | K | passive | GND | 0 |  | ok |
| D6 | 2 | A | passive | LED6 | 0..3.37 |  | ok |
| D7 | 1 | K | passive | GND | 0 |  | ok |
| D7 | 2 | A | passive | LED7 | 0..3.37 |  | ok |
| J1 | A1 | GND | passive | GND | 0 |  | ok |
| J1 | A4 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | A5 | CC1 | passive | CC1 | 0 |  | ok |
| J1 | A6 | DP1 | passive | - | ? |  | nc |
| J1 | A7 | DN1 | passive | - | ? |  | nc |
| J1 | A8 | SBU1 | passive | - | ? |  | nc |
| J1 | A9 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | A12 | GND | passive | GND | 0 |  | ok |
| J1 | B1 | GND | passive | GND | 0 |  | ok |
| J1 | B4 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | B5 | CC2 | passive | CC2 | 0 |  | ok |
| J1 | B6 | DP2 | passive | - | ? |  | nc |
| J1 | B7 | DN2 | passive | - | ? |  | nc |
| J1 | B8 | SBU2 | passive | - | ? |  | nc |
| J1 | B9 | VBUS | passive | VBUS | 4.75..5.5 |  | ok |
| J1 | B12 | GND | passive | GND | 0 |  | ok |
| J1 | SH | SHIELD | passive | GND | 0 |  | ok |
| J2 | 1 | GND | passive | GND | 0 |  | ok |
| J2 | 2 | SWCLK | passive | SWCLK | 0..3.37 |  | ok |
| J2 | 3 | SWDIO | passive | SWDIO | 0..3.37 |  | ok |
| J2 | 4 | NRST | passive | NRST | 0..3.37 |  | ok |
| SW1 | 1 | A | passive | BTN | 0..3.37 |  | ok |
| SW1 | 2 | B | passive | GND | 0 |  | ok |
| U1 | 1 | PB7 | io | - | ? |  | nc |
| U1 | 2 | PC14-OSC32_IN | io | - | ? |  | nc |
| U1 | 3 | PC15-OSC32_OUT | io | - | ? |  | nc |
| U1 | 4 | VDD | supply | +3V3 | 3.23..3.37 | min 2 max 3.6 abs 4 | ok |
| U1 | 5 | VSS | ground | GND | 0 |  | ok |
| U1 | 6 | NRST | io | NRST | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 7 | PA0 | io | GPIO_C | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 8 | PA1 | io | GPIO_A | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 9 | PA2 | io | GPIO_B | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 10 | PA3 | io | GPIO_S | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 11 | PA4 | io | - | ? |  | nc |
| U1 | 12 | PA5 | io | - | ? |  | nc |
| U1 | 13 | PA6 | io | - | ? |  | nc |
| U1 | 14 | PA7 | io | - | ? |  | nc |
| U1 | 15 | PB0 | io | - | ? |  | nc |
| U1 | 16 | PA11 | io | - | ? |  | nc |
| U1 | 17 | PA12 | io | - | ? |  | nc |
| U1 | 18 | PA13 | io | SWDIO | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 19 | PA14 | io | SWCLK | 0..3.37 | max 5.5 abs 7.6 | ok |
| U1 | 20 | PB3 | io | BTN | 0..3.37 | max 5.5 abs 7.6 | ok |
| U2 | 1 | VIN | supply | VBUS | 4.75..5.5 | min 2.2 max 5.5 abs 6 | ok |
| U2 | 2 | GND | ground | GND | 0 |  | ok |
| U2 | 3 | EN | input | VBUS | 4.75..5.5 | min 0 max 5.5 abs 6 | ok |
| U2 | 4 | NC | nc | - | ? |  | nc |
| U2 | 5 | VOUT | supply_out | +3V3 | 3.23..3.37 |  | ok |

## Spec sources

- `specs/parts/KT-0603R.yaml` (KT-0603R): Hubei KENTO KT-0603R spec for approval rev A.0 (2018-12-06): 4. Absolute Maximum Ratings, 5. Electrical Optical Characteristics, 6.2 Vf bins
- `specs/parts/TYPE-C-31-M-12.yaml` (TYPE-C-31-M-12): Korean Hroparts TYPE-C-31-M-12 drawing (LCSC C165948); pin names follow the USB Type-C receptacle pinout
- `specs/parts/Header-1x04.yaml` (PZ254V-11-04P): Generic 1x4 2.54 mm pin header (XFCN PZ254V-11-04P, LCSC C492403); no electrical limits used by ERC
- `specs/parts/TS-1187A.yaml` (TS-1187A-B-A-B): XKB TS-1187A-B-A-B 5.1x5.1 mm SMD tact switch (LCSC C318884); no electrical limits used by ERC
- `specs/parts/STM32G030F6P6.yaml` (STM32G030F6P6): ST DS12991 Rev 3 (LCSC C724040): Figure 5 TSSOP20 pinout, Table 12 pin description (TSSOP20 column), Table 18 voltage and Table 19 current characteristics, Table 21 general operating conditions, Table 71 package thermal characteristics
- `specs/parts/RT9013-33.yaml` (RT9013-33GB): Richtek DS9013-10 (Apr 2011, LCSC C47773): Functional Pin Description (SOT-23-5), Absolute Maximum Ratings, Recommended Operating Conditions, Electrical Characteristics