I3C Common Command Codes (CCC)¶

The I3C core supports all CCCs required by the I3C Basic spec, please see “Table 16 I3C Common Command Codes” for a full reference.

All CCCs are exercised with Cocotb tests.

Broadcast CCCs¶

The following Broadcast CCCs are currently supported by the core (all required Broadcast CCCs as per the errata, and one optional Broadcast CCC):

• ENEC (R) - Enable Events Command

• DISEC (R) - Disable Events Command

• SETMWL (R) - Set Max Write Length

• SETMRL (R) - Set Max Read Length

• SETAASA (O) - Set All Addresses to Static Adresses

• ENTDAA (R) - Enter Dynamic Address Assignment

• RSTDAA (R) - Direct Reset Dynamic Address Assignment - this direct CCC is deprecated, the core NACKs this command as per the spec

• RSTACT (R) - Target Reset Action

  • Broadcast (Format 1) supports defining bytes 0x0, 0x1 and 0x2

Direct CCCs¶

The following Direct CCCs are currently supported by the core (all required Direct CCCs, plus several optional/conditional ones):

• ENEC (R) - Enable Events Command

• DISEC (R) - Disable Events Command

• SETDASA (O) - Set Dynamic Address from Static Address

  • Primary (Format 1)

• SETNEWDA (C) - Set New Dynamic Address

• SETMWL (R) - Set Max Write Length

• SETMRL (R) - Set Max Read Length

• GETMWL (R) - Get Max Write Length

• GETMRL (R) - Set Max Read Length

• GETPID (C) - Get Provisioned ID

• GETBCR (C) - Get Bus Characteristics Register

• GETDCR (C) - Get Device Characteristics Register

• GETSTATUS (R) - Get Device Status

  • The two-byte format (Format 1)

• GETCAPS (R) - Get Optional Feature Capabilities

  • Without defining byte ( Format 1)

• RSTACT (R) - Target Reset Action

  • Direct Write (Format 2) supports defining bytes 0x0, 0x1 and 0x2

  • Direct Read (Format 3) supports defining bytes 0x81 and 0x82 and returns the 0xFF as recovery timing