I2C MMIO Registers

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

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

Summary of Bus: (), Device: (), Function: (), Type: (MEM)

Offset	Size (Bytes)	Register Name (Register Symbol)	Scope	Default Value
0h	4	I2C Control (IC_CON)	Package	00000037h
4h	4	I2C Target Address (IC_TAR)	Package	00001055h
ch	4	I2C High Speed Master Mode Code Address (IC_HS_MADDR)	Package	00000001h
10h	4	Rx/Tx Data Buffer and Command (IC_DATA_CMD)	Package	00000000h
14h	4	Standard Speed I2C Clock SCL High Count (IC_SS_SCL_HCNT)	Package	000001F4h
18h	4	Standard Speed I2C Clock SCL Low Count (IC_SS_SCL_LCNT)	Package	0000024Ch
1ch	4	Fast Speed I2C Clock SCL High Count (IC_FS_SCL_HCNT)	Package	0000004Bh
20h	4	Fast Speed I2C Clock SCL Low Count (IC_FS_SCL_LCNT)	Package	000000A3h
24h	4	High Speed I2C Clock SCL High Count (IC_HS_SCL_HCNT)	Package	00000008h
28h	4	High Speed I2C Clock SCL Low Count (IC_HS_SCL_LCNT)	Package	00000014h
2ch	4	Interrupt Status (IC_INTR_STAT)	Package	00000000h
30h	4	Interrupt Mask (IC_INTR_MASK)	Package	0000085Fh
34h	4	Raw Interrupt Status (IC_RAW_INTR_STAT)	Package	00000000h
38h	4	Receive FIFO Threshold (IC_RX_TL)	Package	00000000h
3ch	4	Transmit FIFO Threshold (IC_TX_TL)	Package	00000000h
40h	4	Clear Combined and Individual Interrupt (IC_CLR_INTR)	Package	00000000h
44h	4	Clear RX_UNDER Interrupt (IC_CLR_RX_UNDER)	Package	00000000h
48h	4	Clear RX_OVER Interrupt (IC_CLR_RX_OVER)	Package	00000000h
4ch	4	Clear TX_OVER Interrupt (IC_CLR_TX_OVER)	Package	00000000h
50h	4	Clear RD_REQ Interrupt (IC_CLR_RD_REQ)	Package	00000000h
54h	4	Clear TX_ABRT Interrupt (IC_CLR_TX_ABRT)	Package	00000000h
58h	4	Clear RX_DONE Interrupt (IC_CLR_RX_DONE)	Package	00000000h
5ch	4	Clear ACTIVITY Interrupt (IC_CLR_ACTIVITY)	Package	00000000h
60h	4	Clear STOP_DET Interrupt (IC_CLR_STOP_DET)	Package	00000000h
64h	4	Clear START_DET Interrupt (IC_CLR_START_DET)	Package	00000000h
68h	4	Clear GEN_CALL Interrupt (IC_CLR_GEN_CALL)	Package	00000000h
6ch	4	I2C Enable (IC_ENABLE)	Package	00000000h
70h	4	I2C Status (IC_STATUS)	Package	00000006h
74h	4	Transmit FIFO Level (IC_TXFLR)	Package	00000000h
78h	4	Receive FIFO Level (IC_RXFLR)	Package	00000000h
7ch	4	SDA Hold Time Length (IC_SDA_HOLD)	Package	00000001h
80h	4	Transmit Abort Source (IC_TX_ABRT_SOURCE)	Package	00000000h
88h	4	DMA Control (IC_DMA_CR)	Package	00000000h
8ch	4	DMA Transmit Data Level (IC_DMA_TDLR)	Package	00000000h
90h	4	Receive Data Level (IC_DMA_RDLR)	Package	00000000h
94h	4	SDA Setup (IC_SDA_SETUP)	Package	00000064h
98h	4	ACK General Call (IC_ACK_GENERAL_CALL)	Package	00000001h
9ch	4	I2C Enable Status (IC_ENABLE_STATUS)	Package	00000000h
a0h	4	SS and FS Spike Suppression Limit (IC_FS_SPKLEN)	Package	00000007h
a4h	4	HS Spike Suppression Limit (IC_HS_SPKLEN)	Package	00000002h