From Xiaochen Xu: Please see reg 10[8], SYNC_Pattern in the 5808A datasheet pg. 31 SYNC_PATTERN: Address: 10[8] By enabling this bit, all channels' test pattern outputs are synchronized. When 10[8] is set as 1, the ramp patterns of all 8 channels start simultaneously. Because we do NOT recommend AFE5808 for new designs, we only added this to AFE5808A and 5809.
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