MDB Category Interrupt Group Identifier Specific Interrupt Identifier Value Description
MDB[7:5] MDB[4:0]
User Defined 3’b000 5’h00 – 5’h1F Vendor Reserved Defined by the vendor and reserved for vendor definition 
I3C WG  3’b001 5’h00 – 5’h0C MIPI Alliance I3C WG Reserved Defined and interpreted based on some reserved values allocated by MIPI Alliance I3C WG
5’h0D Error with additional data bytes in IBI payload Indicates that the interrupt is related to a specific functionality
5’h0E Generic error, no additional data bytes in IBI payload  
5’h0F – 5’h11 MIPI Alliance I3C WG Reserved  
5’h12 Monitoring Devices Interrupt Enabling  
5’h13 – 5’h16 MIPI Alliance I3C WG Reserved  
5’h17 D2DT Identifier  
5’h18 – 5’h1F MIPI Alliance I3C WG Reserved  
MIPI Groups 3’b010 5’h00 – 5’h1B MIPI Alliance Reserved Allocated and reserved by MIPI Alliance Working Groups, and approved by MIPI Alliance I3C WG.
5’h1C – 5’h1D MIPI Alliance Debug WG Reserved Indicates that the interrupt is generated by a Device that wants to send a specific MIPI Alliance WG-related interrupt (e.g., Debug)
5’h1E – 5’h1F MIPI Alliance Reserved  
Non MIPI Reserved 3’b011 5’h00 – 5’h1F Non MIPI Reserved Allocated for uses outside of MIPI Alliance
Timing Information 3’b100 5’h00 – 5’h1F Vendor Reserved May have any value defined by the vendor
Pending Read Notification 3’b101 5’h00 – 5’h0C MIPI Alliance I3C WG Reserved Indicates that the interrupt is generated by a Device that wants to send a specific MIPI Alliance WG-related or vendor-specific interrupt, and has a data message which will be returned on the next Private Read if ACKed (see I3C Specification Section 5.1.6.2.2)
5’h0D MIPI Alliance Debug WG Reserved
5’h0E MCTP Packet (for DMTF)
5’h0E – 5’h0F MIPI Alliance I3C WG Reserved
    5’h10 – 5’h1F Vendor Reserved
Reserved 3’b110 Reserved
Reserved 3’b111 Reserved