Minnowboard:SPI Boot flash
the MinnowBoard uses a SPI based serial flash memory to load the initial code into the Intel Atom E640 series processor. The MinnowBoard uses a WinBond W25Q32 (datasheet) which has a total of 4096KB of storage which can be flashed with a UEFI image or other custom firmware.
the MinnowBoard has a 2x4 header that has 0.1" spacing for programming the SPI based serial flash memory.
|Pin number||Main Function||Note|
|1||+3.3V Power||Supports on +3.3V|
|3||nCS||Chip Select Active Low|
|5||MISO||Data Output from serial flash|
|6||MOSI||Data Input to serial flash|
|8||nPRG_EN||Program Enable Active Low|
Applications and Hardware
- Flashrom is an open source utility that allows you to work with the SPI based serial flash memory on the MinnowBoard.
- Flashrom supports a wide range of flash devices (Supported Hardware) including the WinBond W25Q32.
- Flashrom can automatically detect the presence of the WinBond W25Q32 and provide full read/erase/write functionality.
- Flashrom can use the many open as well as proprietary hardware tools such as