SBASA81A January 2023 – December 2023 ADS9815 , ADS9817
PRODUCTION DATA
Writing to registers in a daisy-chain configuration requires N × 24-SCLKs in one SPI frame. A register write in a daisy-chain containing four ADCs, as shown in Figure 6-12, requires 96 SCLKs.
Daisy-chain mode is enabled on power-up or after device reset. Configure the DAISY_CHAIN_LENGTH field to enable daisy-chain mode. The waveform shown in Figure 6-12 must be repeated N times, where N is the number of ADCs in the daisy-chain. Figure 6-13 provides the SPI waveform, containing N SPI frames, for enabling daisy-chain mode for N ADCs.