Renesas
| Device Code | AT25SF321 |
| Family | AT25S |
| Protocol(s) | FlashRunner 2.0: QUAD-SPI, SPI - FR Cube: SPI |
| Memory Size | FLASH: 4 MB |
| Algorithm | FlashRunner 2.0: SERMEM4 - FR Cube: memspi01 |
| Commercial Class | Mass Market |
| Big-Size Memory | No |
Availability
| FlashRunner HS, FlashRunner NXG, FlashRunner 2.0 | Available |
| FlashRunner CUBE | Available |