Now I am thinking of using four 74HC137 3-to-8 decoders to decode SPI devices.
Four pins can be used to select 1 of 8, so MCP23S17's 16 pins, if all assigned as output, can be grouped to four groups of 4 each. to select 4 SPI devices, 1 from each 8 device group.
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1 comment:
Employing the 74HC137 3-to-8 decoder alongside the MCP23S17 expands digital input/output capabilities. Needed Minimum Spaces By decoding signals, it simplifies interfacing with multiple devices.
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