The W25Q32 is a 32Mbit (4MB) SPI NOR Flash memory IC by Winbond. It supports standard, dual, and quad SPI up to 104MHz and is widely used for data logging, firmware storage, and program memory in embedded systems.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | CS | Chip select, active low | BUS |
| 2 | DO/IO1 | SPI data out / quad I/O 1 | BUS |
| 3 | WP/IO2 | Write protect / quad I/O 2 | I/O |
| 4 | GND | Ground | GND |
| 5 | DI/IO0 | SPI data in / quad I/O 0 | BUS |
| 6 | CLK | SPI clock | BUS |
| 7 | HOLD/IO3 | Hold / quad I/O 3 | I/O |
| 8 | VCC | Supply 2.7Vā3.6V | PWR |