24 lines
884 B
Markdown
24 lines
884 B
Markdown
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# Flashing firmware standalone
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If none of the other methods work, there are three possibilities:
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## Desolder
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You must remove or desolder the flash IC before you can flash it.
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It's recommended to solder a socket in place of the flash IC.
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When flashing the IC, always connect all input pins.
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If in doubt, pull /WP, /HOLD, /RESET and alike up towards Vcc.
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## SPI flash emulator
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If you are a developer, you might want to use an [EM100Pro] instead, which sets
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the onboard flash on hold, and allows to run custom firmware.
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It provides a very fast development cycle without actually writing to flash.
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## SPI flash overwrite
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It is possible to set the onboard flash on hold and use another flash chip.
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Connect all lines one-to-one, except /HOLD. Pull /HOLD of the soldered flash IC
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low, and /HOLD of your replacement flash IC high.
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[EM100Pro]: https://www.dediprog.com/product/EM100Pro
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