Component Pin Analysis
Table
| Pin | Pin number | Notes |
|---|---|---|
| GPIO0 / IO0 | 4 | Boot mode strapping pin |
| GPIO45 / IO45 | 41 | VDD_SPI voltage strapping pin |
| GPIO46 / IO46 | 44 | Boot mode and ROM message print control strapping pin |
Table
| Pin | Default |
|---|---|
| GPIO0 | Pull-up, bit 1 |
| GPIO45 | Pull-down, bit 0 |
| GPIO46 | Pull-down, bit 0 |
Table
| GPIO0 | GPIO46 | Mode |
|---|---|---|
| 1 | X | SPI boot default |
| 0 | 0 | Download boot |
| 0 | 1 | Invalid / avoid |
Table
| Pin | Pin number | Type |
|---|---|---|
| IO46 / GPIO46 | 44 | Input-only |
| EN | 45 | Input |
Table
| Pin | Pin number | Memory-related function |
|---|---|---|
| IO9 | 13 | FSPIHD |
| IO10 | 14 | FSPICS0 / FSPIIO4 |
| IO11 | 15 | FSPID / FSPIIO5 |
| IO12 | 16 | FSPICLK / FSPIIO6 |
| IO13 | 17 | FSPIQ / FSPIIO7 |
| IO14 | 18 | FSPIWP / FSPIDQS |
| IO26 | 26 | SPICS1 |
| IO33 | 28 | SPIIO4 / FSPIHD |
| IO34 | 29 | SPIIO5 / FSPICS0 |
| IO35 | 31 | SPIIO6 / FSPID |
| IO36 | 32 | SPIIO7 / FSPICLK |
| IO37 | 33 | SPIDQS / FSPIQ |
| IO38 | 34 | FSPIWP |
Table
| Pin | Pin number | Restriction |
|---|---|---|
| IO26 | 26 | Used by embedded PSRAM on N4R2 variants, so it cannot be used for other purposes on those versions |
Pin TypeSectionPin GroupSub-symbol Designator SuffixESP32-S2-MINI-1U