Hi, First and foremost, thank you very much for responding so quickly - apologies for not following up on this. I found the mistake due to your help - about how the 1.6 kHz SHOULD be visible on interrupt. But my problem was actually due to a mistake in the datasheet in section 4.6.1 in step 2, where I'm instructed to write 0xA7 to ACC_CONF. This is incorrect, as the ODR is 0x07 (50 Hz) and not 1.6 kHz. The bullet points below are correct, although terms such as norm_avg4 etc. is not used elsewhere in the data sheet - so skipped them completely. So instead 0xAC should be written to ACC_CONF, and then the self-test works well, at least for the single unit I tried this on
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