Serial peripheral interface bus topology with multiplexed chip select addressing

A method comprising:

• determining whether a software request at a microcontroller unit (MCU) is pending, the software request being to read data from a serial peripheral interface (SPI) device or write the data to the SPI device, the SPI device being selected from a plurality of SPI devices arranged in an SPI device matrix and being electrically connected to the MCU;
• responsive to determining that the software request is pending, driving, by the MCU, a column select signal and a row select signal with an SPI device address associated with the SPI device;
• decoding, by a chip select decoder logic, the column select signal and the row select signal, wherein the chip select decoder logic is electrically connected to each of the plurality of SPI devices;
• and
• performing, by the MCU, an SPI transaction with the SPI device selected from the plurality of SPI devices, the SPI transaction being one of reading the data from the SPI device or writing the data to the SPI device.