Out-of band interrupt mapping in MIPI improved inter-integrated circuit communication

An I3C device for an improved inter-integrated circuit (I3C) bus, the device comprising:

• communication circuitry to identify a received I3C in-band interrupt (IBI) that includes information related to an inter-integrated circuit (I2C) out-of-band interrupt (OBI) from an I2C device, the I3C IBI being received from another device over the I3C bus to which the I3C device the I2C device and the other device are coupled, the other device having transmitted the I3C IBI on behalf of the I2C device which is unable to directly generate the I3C IBI on the I3C bus, and the information related to the I2C OBI includes information indicating to the I3C device that the I2C OBI is from the I2C device;
• and
• processing circuity coupled with the communication circuitry, the processing circuitry to:
• consume the information related to the I2C OBI.

One or more non-transitory computer readable media comprising computer readable instructions which, when executed by a host controller, cause the host controller to:

• identify a received inter-integrated circuit (I2C) out-of-band interrupt (OBI) from an I2C device that is unable to directly generate an improved inter-integrated circuit (I3C) in-band interrupt (IBI) on an I3C bus for consumption by one or more I3C devices coupled to the I3C bus, to which the I2C device and the host controller are also coupled;
• generate the improved inter-integrated circuit (I3C) in-band interrupt (IBI), based on the I2C OBI, and includes information indicating to the one or more I3C devices that the I2C OBI is from the I2C device;
• and
• issue the I3C IBI on the I3C bus for consumption by the one or more I3C devices.

One or more non-transitory computer readable media comprising computer readable instructions which, when executed by a slave device on an improved inter-integrated circuit (I3C) bus, cause the slave device on the I3C bus to:

• identify an I3C in-band interrupt (IBI) received through the I3C bus, the I3C IBI including information related to an inter-integrated circuit (I2C) out-of-band interrupt (OBI) on which the I3C IBI is based, the I2C OBI being originated from an I2C device and provided to a master device, which in turn issued the I3C IBI on behalf of the I2C device, wherein the master device, the slave device and the I2C device are all coupled to the I3C bus, and the I2C device is unable to directly generate the I3C IBI on the I3C bus;
• interpret the information related to the I2C OBI included in the I3C IBI, wherein the information related to the I2C OBI includes source information related to the I2C OBI identifying the I2C OBI is from the I2C device;
• and
• identify, based on the source information related to the I2C OBI, the I2C device that generated the I2C OBI.