12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
| ID | Date | Version | Classification |
|---|---|---|---|
| 767625 | 07/13/2023 | Public |
Host Controller Misc Reg2 (HOST_CTRL_MISC_REG2) – Offset 80B4
Host Controller Misc Reg2
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:29 | 0x0 | RW | Max Short Packet Advance Counter (MAX_SHORT_PKT_ADV_CNT) Short Packet Advance Throttling |
| 28 | 0x1 | RW | Disable Scheduler FrameID Check (DIS_SCH_FRAMEID_CHK) Disable Scheduler FrameID check. |
| 27 | 0x0 | RW | Disable ISOC Buffer Overrun Detect (DISABLE_ISOC_BUF_OVERRUN_DETECT) Enable bit to disable ISOC buff overrun error code reporting. |
| 26 | 0x0 | RW | Disable CPL NODMA TRB Walk (DISABLE_CPL_NODMA_TRB_WALK) Enable bit to walk NON-DMA TRB at the end of TD. |
| 25 | 0x0 | RW | LTM Belt Valid Clear (LTM_BELT_VALID_CLR) LTM Belt Valid Clear |
| 24 | 0x0 | RW | TRM Drop Scheduler Request Disable (CFG_TRM_DROP_SCH_REQ_DIS) TRM Drop Scheduler Request Disable |
| 23 | 0x1 | RW | TRM Drop TTE Request Disable (CFG_TRM_DROP_TTE_REQ_DIS) TRM Drop TTE Request Disable |
| 22 | 0x0 | RW | TRM EDTLA Clear Disable (CFG_TRM_EDTLA_CLR_DIS) TRM EDTLA Clear Disable |
| 21 | 0x0 | RW | XFER is_serve Check Enable (CFG_XFER_IS_SERVE_CHK_EN) Enable checking is_serve condition in XFER, mainly for undoing fix if needed |
| 20 | 0x0 | RW | Remote Flow Control Disable (CFG_CPL_NPKT0_FC_DIS) Set low to allow receiving ACK with NUMP>0 to bring the TRM out of Remote Flow Control |
| 19:18 | 0x0 | RW | rsvd_19_17 (RSVD1) reserved |
| 17 | 0x0 | RW | Disable IDT credit leak fix (CFG_DIS_ODMA_IDT_CRD_LEAK_FIX) Disable the IDT credit leak fix in odma. |
| 16 | 0x0 | RW | IDMA Tranfer Type_Check Disable (CFG_IDMA_TTYPE_CHK_DIS) Set to disable packet Transfer Type checking in IDMA |
| 15 | 0x0 | RW | Host Controller Reset Controller Isolation Disable (HCRST_CTRL_ISOL_DISABLE) Setting this bit to 1 will disable the Host Controller Reset based quiescing/isolation flow |
| 14 | 0x0 | RW | Disable IDMA Performance Fix (DISABLE_IDMA_PERF_FIX) Fix is enabled by default |
| 13 | 0x0 | RW | Enable HH Frindex Not Run (EN_HH_FRINDEX_NOT_RUN) Enable HH Frindex Not Run |
| 12 | 0x0 | RW | Disable IDT Fix ODMA (DISABLE_IDT_FIX_ODMA) Disable DMA_RD_WAIT_IDT arc fix. |
| 11 | 0x0 | RW | Disable Ping Fix ODMA (DISABLE_PING_FIX_ODMA) 0: Fix enabled |
| 10 | 0x0 | RW | Disable CERR (Consecutive Errors) Fix (DISABLE_CERR_FIX_IDMA) 0: Fix enabled |
| 9 | 0x0 | RW | Enable 100ms Watch Dog Timer (EN_100MS_WATCH_DOG_TIMER) 0: 300ms Watch Dog Timer for PHY status assertion |
| 8 | 0x1 | RW | Enable Watch Dog Timer (EN_WATCH_DOG_TIMER) When set, it will enable 100/300ms watch dog timer for PHY status assertion |
| 7 | 0x1 | RW | enable SSP ISOC Pipelining (EN_SSP_ISOC_PIPELINING) Enable ISOC Pipelining feature for SSP devices. |
| 6 | 0x0 | RW | Disable Trunk Clock Gating Un-gate on Flush (DISABLE_TCG_UNGATE_ON_FLUSH) When set, it will ungate the trunk clock gating for PIPE clock when there is flush whe DBC/EXI HHH is not idle. |
| 5 | 0x0 | RW | Disable VNN Frame Timer (DISABLE_VNN_FRAME_TIMER) Frame Timer Select |
| 4 | 0x0 | RW | Disable Clear CCS on CAS Set (DISABLE_CLR_CCS_ON_CAS_SET) Disables Clear CCS on CAS. |
| 3 | 0x0 | RW | Disable Root Hub Park at DBC Disconnect (DISABLE_RHUB_PARK_AT_DBCDISC) On Default Enables Root Hub s/m to arc to DBC_DISCONNECTED from ERROR and RESET states if the reason to enter into those state was a prior connection failure to exchange Link Capabilities |
| 2 | 0x1 | RW | Disable WPR on Disconnected Ports (DISABLE_BLOCK_WPR_ON_DISPORTS) Warm Port Reset on Disconnected Port Disable |
| 1:0 | 0x0 | RW | Reserved0 bits (HOST_CTRL_MISC_REG2_1_0) Reserved |