Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs

ID 814346
Date 7/19/2024
Public

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5.8.6.5.14. Broadcast CCCs in I2C Speed

The JEDEC Sideband Specification allows to issue certain broadcast CCCs (DEVCTRL and SETHID) in I2C mode to indicate bus context before address assignment with SETAASA CCC. The JEDEC Sideband Specification mandates sending these broadcast CCCs from the master in limited speed 1MHz to guarantee that these CCCs are registered by the slave devices without any error.

You can issue broadcast CCCs with I2C FM speed by setting the TRANSFER_COMMAND[SPEED] field to I2C FM. The master controller generates those CCCs in I3C protocol mode with I2C FM speed.