I2C Bus to Satellite Controller

T2 Telco Accelerator Card User Guide (UG1496)

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1.0 English

The I2C bus signals to the Zynq® UltraScale+™ RFSoC are PS_SOC_SCL and PS_SOC_SDA. These signals are used to support data transfers between the SC and RFSoC in support of the following functions:

In-band telemetry
Provides the host access to board power and temperature telemetry data using PCIe technology.
In-band SC firmware update
Allows the SC firmware to be updated using PCIe technology.

The I2C interface is connected to MIO pins of the Zynq® UltraScale+™ RFSoC PS, meaning that an integrated IP solution is available. The I2C interface must be operated in slave mode and cannot be a master because the SC is the master, and drives an SCL clock.