10.1 Interfacing with the Host Microcontroller

This section describes interfacing the ATWINC3400-MR210xA module with the host microcontroller. The interface is comprised of a slave SPI and additional control signals, as shown in the following figure. For more information on SPI interface specification and timing, refer to the SPI Interface. Additional control signals are connected to the GPIO/IRQ interface of the microcontroller.

Figure 10-1. Interfacing with Host Microcontroller

Table 10-1. Host Microcontroller Interface Pins
Pin Number	Pin Name
7	RESETN
33	IRQN
19	CHIP_EN
25	SPI_SSN
26	SPI_MOSI
24	SPI_MISO
23	SPI_SCK

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