Intel® Management Engine Interface (MEI) PCI Configuration Registers

Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

ID	Date	Version	Classification
834576	10/10/2024	001	Public

The following registers apply to the following Intel(R) Management Engine Interfaces (MEI):
MEI 1 at Device 22:Function 0
MEI 2 at Device 22:Function 1
MEI 3 at Device 22:Function 4
MEI 4 at Device 22:Function 5

Summary of Bus: (128), Device: (22), Function: (), Type: (CFG)

Offset	Size (Bytes)	Register Name (Register Symbol)	Scope	Default Value
0h	4	HECI ID (HECI1_ID)	Package	00688086h
4h	2	HECI Command (HECI1_CMD)	Package	0000h
6h	2	HECI Status (HECI1_STS)	Package	0010h
8h	4	Revision ID And Class Code (HECI1_RID_CC)	Package	07800000h
ch	1	Cache Line Size (HECI1_CLS)	Package	00h
dh	1	Master Latency Timer (HECI1_MLT)	Package	00h
eh	1	Header Type (HECI1_HTYPE)	Package	80h
fh	1	Built In Self-Test (HECI1_BIST)	Package	00h
10h	4	HECI MMIO Base Address Low (HECI1_MMIO_MBAR_LO)	Package	00000004h
14h	4	HECI MMIO Base Address High (HECI1_MMIO_MBAR_HI)	Package	00000000h
2ch	4	Sub System Identifiers (HECI1_SS)	Package	00000000h
34h	4	Capabilities Pointer (HECI1_CAP)	Package	00000050h
3ch	2	Interrupt Information (HECI1_INTR)	Package	0100h
3eh	1	Minimum Grant (HECI1_MGNT)	Package	00h
3fh	1	Maximum Latency (HECI1_MLAT)	Package	00h
40h	4	Host Firmware Status (HECI1_HFS)	Package	00000000h
44h	4	Miscellaneous Shadow (HECI1_MISC_SHDW)	Package	80000000h
48h	4	General Status Shadow 1 (HECI1_GS_SHDW1)	Package	00000000h
4ch	4	Host General Status (HECI1_H_GS1)	Package	00000000h
50h	2	PCI Power Management Capability ID (HECI1_PID)	Package	8C01h
52h	2	PCI Power Management Capabilities (HECI1_PC)	Package	4003h
54h	2	PCI Power Management Control And Status (HECI1_PMCS)	Package	0008h
60h	4	General Status Shadow 2 (HECI1_GS_SHDW2)	Package	00000000h
64h	4	General Status Shadow 3 (HECI1_GS_SHDW3)	Package	00000000h
68h	4	General Status Shadow 4 (HECI1_GS_SHDW4)	Package	00000000h
6ch	4	General Status Shadow 5 (HECI1_GS_SHDW5)	Package	00000000h
70h	4	Host General Status 2 (HECI1_H_GS2)	Package	00000000h
74h	4	Host General Status 3 (HECI1_H_GS3)	Package	00000000h
8ch	2	Message Signaled Interrupt Identifiers (HECI1_MID)	Package	A405h
8eh	2	Message Signaled Interrupt Message Control (HECI1_MC)	Package	0080h
90h	4	Message Signaled Interrupt Message Address (HECI1_MA)	Package	00000000h
94h	4	Message Signaled Interrupt Upper Address (HECI1_MUA)	Package	00000000h
98h	2	Message Signaled Interrupt Message Data (HECI1_MD)	Package	0000h
a0h	1	HECI Interrupt Delivery Mode (HECI1_HIDM)	Package	00h
a4h	4	Vendor Specific Capability Register (HECI1_VSCR)	Package	F0140009h
a8h	4	Vendor Specific Extended Capability Register (HECI1_VSEC)	Package	01400010h
ach	4	SW LTR Pointer Register (HECI1_SWLTRPTR)	Package	00000000h
b0h	4	Device Idle Pointer Register (HECI1_DEVIDLEPTR)	Package	00008001h
b4h	2	Device Idle Power On Latency (HECI1_DEVIDLEPOL)	Package	0D38h
b6h	2	DevIdle Power Control Enabled Register (HECI1_PWRCTRLEN)	Package	000Eh
bch	4	Host Extend Register Status (HECI1_HERS)	Package	40000000h
c0h	4	Host Extend Register DW1 (HECI1_HER1)	Package	00000000h
c4h	4	Host Extend Register DW2 (HECI1_HER2)	Package	00000000h
c8h	4	Host Extend Register DW3 (HECI1_HER3)	Package	00000000h
cch	4	Host Extend Register DW4 (HECI1_HER4)	Package	00000000h
d0h	4	Host Extend Register DW5 (HECI1_HER5)	Package	00000000h
d4h	4	Host Extend Register DW6 (HECI1_HER6)	Package	00000000h
d8h	4	Host Extend Register DW7 (HECI1_HER7)	Package	00000000h
dch	4	Host Extend Register DW8 (HECI1_HER8)	Package	00000000h