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Before writing any data to the WM2626, the interface must be enabled by setting NCS to low. Incoming data on DIN (starting with the MSB) is then shifted bit-per-bit into the internal register on the falling edges of SCLK. From there data is loaded into the target latch after 16 bits have been transferred, or when NCS rises. Four internal latches can be addressed: DAC A, DAC B, the buffer latch or the control register. Their function is explained below (see 'Register Addressing').
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