Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Telemetry Mailbox Interface Register (TELEMETRY_MB_INTERFACE) – Offset 15e8
Telemetry mailbox interface register for use by host software.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31 | 0h | RW/1S/V | Run_Busy (Run_Busy) The run/busy bit can only be set by the requesting agent and can only be cleared by the responding agent. When this bit is set it will prompt the PMC to execute the command placed in the mailbox. The PMC will clear this flag after the command has been processed and a completion code has been written back into the COMMAND field and any data requested has been written into the DATA field. |
| 30:28 | 0h | RO | Reserved |
| 27:24 | 0h | RW/V | PARAM3 (PARAM3) Some command requires additional fields which is passed into this 4-bit field. |
| 23:16 | 0h | RW/V | PARAM2 (PARAM2) Some command requires additional fields which is passed into this 8-bit field. |
| 15:8 | 0h | RW/V | PARAM1 (PARAM1) Some command requires additional fields which is passed into this 8-bit field. |
| 7:0 | 0h | RW/V | Command (Command) The requesting agent will write the PMC command opcode into this field. When the PMC has completed the API command, the PMC will write a completion code (CC) back into this field. |