Avago Technologies ACPL-7210-00RE - Manual (Page 3)

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Figure 2. Configuration for SPI Operation
SPI Operation (Refer to Figure 2)
1. Short i) upper 2 pins of J1, ii) upper 2 pins of J4, and iii) lower 2 pins of J5.
2. J2 and J3 should be left open.
3. Connect a 3.3/5V power supply to VDD1 and GND1.
4. Connect a 3.3/5V power supply to VDD2 and GND2.
5. The master device should be connected to SCK(SPI_M), MOSI(SPI_M), and MISO(SPI_M).
6. The slave device should be connected to SCK(SPI_S), MOSI(SPI_S), and MISO(SPI_S).
Short upper
2 pins of J1
Short upper 2 pins of J4,
and lower 2 pins of J5
J2 and J3 should
be left open