1.3 UART/I²C Pin Details

Connect the UART or I²C to the PC, and power on the ATWINC/ATWILC. Ensure that the ATWINC/ATWILC is in the right test mode with the correct pins.

The following table provides the I²C connection for ATWINC/ATWILC 1XXX and 3XXX series.

Table 1-1. I²C Connection
Connections	1XXX Module series	1XXX Chip series	3XXX Module series	3XXX Chip series
I2C Slave Data	Pin 3	Pin 33	Pin 10	Pin 16
I2C Slave clock	Pin 2	Pin 32	Pin 11	Pin 17
BT_TXD	NA	NA	Pin 8	Pin 14
BT_RXD	NA	NA	Pin 9	Pin 15

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