Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
DEVIDLE Control (HECI4_DEVIDLEC) – Offset 800
This register allows host to configure the power mode
using D0i0/D0i3 support.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:5 | 0h | RO | Reserved (RSVD_31_5) Reserved. |
| 4 | 1h | RO | Interrupt Request Capable (IRC) Set to be always 1'b1 since CSE is capable of generating an interrupt on command completion. |
| 3 | 0h | RO | Restore Required (RR) When this bit is set (by HW), SW must restore the state of the |
| 2 | 0h | RW | Dev Idle state (DEVIDLE) SW sets this bit to 1'b1 to move the function into the DevIdle state. Writing this bit to 1'b0 |
| 1 | 0h | RW | Interrupt Request (IR) SW sets this bit to 1'b1 to ask for an interrupt to be generated on completion of the command. |
| 0 | 0h | RO/V | Command In Progress (CIP) HW sets this bit on a 1'b1->1'b0 or 1'b0->1'b1 transition of DEVIDLE. While set, the other bits in |