SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
An SSI module is a 4-wire bidirectional communications interface that converts data between parallel and serial. The SSI performs serial-to-parallel conversion on data received from a peripheral device and performs parallel-to-serial conversion on data transmitted to a peripheral device. The SSI can be configured as either a master or slave device. As a slave device, the SSI can be configured to disable its output, which allows coupling of a master device with multiple slave devices. The TX and RX paths are buffered with separate internal FIFOs.
The SSI also includes a programmable bit rate clock divider and prescaler to generate the output serial clock derived from the input clock of the SSI. Bit rates are generated based on the input clock, and the maximum bit rate is determined by the connected peripheral.
The CC13x2x7 and CC26x2x7 device platform includes two SSI modules with the following features: