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Background on digital audio and bus isolation — separate from product ordering and pinout.
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Understanding I2S Bus and Audio Isolation
Wire counts, clock master vs slave, MCLK, GPIO, and typical power — no factory options.
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Understanding I2C Bus Isolation
Pull-ups, crossing an isolation barrier, and I2C alongside I2S — no factory options.
Hardware pinout and ordering for I2S-001: User's Guide