Address 0x1C - Intrepid Device Commands

Writing to address 0x1C with one of the following control byte values can be used to change the PHY configuration, mode of operation, as well as read back information such as PHY temperature and firmware version.

The SFP-MV2112 does not support MACsec or TC10.

Any MACsec or TC10 commands in the following table are not supported by the SFP-MV2112.

	Control Byte	Command
Write Commands	0	Enter Lower Power Mode	Device will remain in low power until I2C message matching any of the 4 supported i2c slave addresses
	1	Jump to Bootloader	SFP remains in bootloader expecting firmware update. Exit via power cycle.
	2	PHY Configuration Command	The PHY configuration can be changed by sending this control byte value accompanied with 5 data bytes
	3	TC10 Wakeup	Toggle TC10 wake pin
	6:4	Reserved
Read Commands	7	Read PHY Temperature	Value in Celsius
	8	Read SFP Minor Firmware Version
	9	Read SFP Major Firmware Version
	10	MACsec Update	Accept settings and write MACsec configuration to the PHY
	11	Write MACsec Rule Settings
	12	Write MACsec Map Settings
	13	Write MACsec SecY Settings
	14	Write MACsec SC Settings
	15	Write MACsec SA Settings
	16	Read Link Status	bit 0: Link Status	0 = Link down
				1 = Link up
			bit 1: Link resolved	0 = Not resolved
				1 = Resolved
			bit 2: Duplex	0 = Half duplex
				1 = Full duplex
			bit 3: Mode	1 = Master
				0 = Slave
			bit 4: Reserved
			bits 7:5: Speed	0b000 = 10Mbps
				0b001 = 100Mbps
				0b010 = 1000Mbps
				0b011 = 2.5Gbps
				0b100 = 5Gbps
				0b101 = 10Gbps
	17	Read PHY Firmware Version	3-byte version of the form x.y.z (SFP-MVQ3244 only)
	25	Read PHY Signal Quality Indicator (SQI)	SQI value reported by the PHY.	SFP-MV2112: Range 0-15
				All other devices: 0-7

Data Byte Encoding for 0x1C PHY Configuration Command

Data Bytes	PHY Setting	Data Byte Value
Byte 1	Link Speed	0x03 = 2.5Gbps	All other values default to 2.5Gbps
		0x04 = 5Gbps
		0x05 = 10Gbps
Byte 2	Link Mode	0x01 = Master	All other values default to Slave
		0x02 = Slave
		0x03 = Auto
Byte 3	Reserved
Byte 4	Auto-Negotiation	0bxxxxxxx0 = Disabled	LSb state enables/disabled feature
		0bxxxxxxx1 = Enabled
Byte 5	PHY Enable/Disable	0bxxxxxxx0 = Disabled	LSb state enables/disabled PHY
		0bxxxxxxx1 = Enabled
Byte 6	PHY SerDes Link	0x01 = 2500BASE-X
		0x02 = 2.5GBASE-X (Default for 2.5Gbps)
		0x03 = 5000BASE-R
		0x04 = 5GBASE-R (Default for 5Gbps)
		0x05 = 10GBASE-R (Default for 10Gbps)
		0x06 = 5G-USXGMII
		0x07 = 10G-USXGMII

The following shows example messages for various 0x1C commands.