> 3.10.3 | I²C Interface

> The I²C interface is located at the IO interface connector of the TC65 Terminal.
> I²C is a serial, 8-bit oriented data transfer bus for bit rates up to 400kbps in fast mode. It consists of two lines. These are the serial data line I2CDAT and the serial clock line I2CCLK.
> The TC65 Terminal acts as a single master device, e.g. the clock I2CCLK is driven by the Terminal. The connection I2CDAT is a bi-directional line.
> Each device which is connected to the bus is software addressable by a unique address and simple master/slave relationships exists at all times. The Terminal operates as master-transmitter or as master-receiver. The customer application transmits or receives data only on request of the Terminal. To configure and activate the I2C interface use the AT^SSPI command described in [1].
> The I 2C interface is only available if the pins 1 and 2 of the IO interface connector are not used as SPI interface.

> Table 14: | I²C interface – signal description

> Signal name | Pin | Description
> I2CDAT_SPIDO | 1 | Data in/out – bidirectional serial data line
> I2CCLK_SPICLK | 2 | Serial clock line