Intel IXF1104 manual I2C Control Ports 0 - 3 $0x79B, I2C Data Ports 0 - 3 $0x79F, Datasheet

IXF1104 4-Port Gigabit Ethernet Media Access Controller

Table 155. I2C Control Ports 0 - 3 ($0x79B)

Bit	Name	Description		Type1	Default
Register Description: This register controls and monitors the interface to the optical modules					0x00000000
when used in fiber mode.
31:28	Reserved	Reserved		RO	0x0
27	wp_err	An attempt to write to the protected E2PROM has		R	0
		occurred.
		This bit is set to 1 when a write and subsequent
		read from an Optical Module Interface has failed.
26	no_ack_err	This signal should be used to validate the data		R	0
		being read. Data is only valid if this bit is equal to
		zero.
25	I2C_enable	Enable the I2C block.		R/W	0
24	I2C_start	Start the I2C transfer.		R/W	0
23	Reserved	Reserved		RO	0
22	write_complete	Bit is asserted when write access is complete.		R	0
21	Reserved	Reserved		RO	0
20	Read_complete	Bit asserted when read access is complete.		R	0
19:18	Reserved	Reserved		RO	0
17:16	Port Select	Selects the port for which the I2C transaction is		R/W	00
		targeted. Valid range is 0 to 3.
15	Read/Write	0 =	Write transaction	R/W	0
		1 =	Read transaction
14:11	Device ID	Most-significant four bits of device address field.		R/W	0x0
		Bits 10:8 select the least-significant three bits of
10:0	Register Address	the device address field		R/W	0x000
		Bits 7:0 select the word/register address

1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear; R/W/C = Read/Write, Clear on Write

Table 156. I2C Data Ports 0 - 3 ($0x79F)

Bit	Name	Description	Type1	Default
Register Description: These registers hold data bytes that are read and written using the I2C
interface to Optical Module Interfaces connected to each port of the IXF1104 4-Port Gigabit				0x00000000
Ethernet Media Access Controller.
31:24	Reserved	Reserved	RO	0x00
23:16	Write Data	Bit 23=MSB, Bit 16 = LSB	R/W	0X00
		Data to be written to the Optical Module Interface.
15:8	Reserved	Reserved	RO	0x00
7:0	Read Data	Bit 7 = MSB, Bit 0 = LSB	R/W	0X00
		Data read from the Optical Module Interface.

1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear; R/W/C = Read/Write, Clear on Write

222 Datasheet

Document Number: 278757

Revision Number: 007

Revision Date: March 25, 2004