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2.10 - SPC (… and SCL/SDA/SCA)

The SPC terminal is used for manually resetting default values or jumping in/out of flash programming mode.

Hardware revision 1.20 and 1.21, had terminals labeled SCL, SDA, and/or SCA. On revision 1.20, these terminals did nothing except that SCL is used for the SPC functionality described above. On revision 1.21, these terminals were used for asynchronous functionality, and SCL is used for the SPC functionality described above. Note that these terminals never have anything to do with I²C.