Host Integration

Overview

This section describes the connections that would need to be made to an external host for plug and play integration with existing devices.

When an intent is found, the XCORE device will check if the host is awake, by checking the Host Status GPIO pin. If the host is awake the intent code will be transmitted over I²C and/or UART.

If the host is not awake, the XCORE device will trigger a transition of the Wakeup GPIO pin. This can be configured to be a rising or falling edge. The XCORE device will then wait for a fixed period of time, set at compile time, before transmitting the intent over the I²C and/or UART interface. This behavior can be changed as desired by modifying the intent handling code.

UART

Table 3 UART Connections

FFD Connection	Host Connection
J4:24	UART RX
J4:20	GND

I²C

Table 4 I²C Connections

FFD Connection	Host Connection
J4:3	SDA
J4:5	SCL
J4:9	GND

GPIO

Table 5 GPIO Connections

FFD Connection	Host Connection
J4:19	Wake up input
J4:21	Host Status output