LAN8670/1/2

5.1.5 MMD Access Control Register

Name:	MMDCTRL
Address:	0x0D


Bit	15	14	13	12	11	10	9	8
	FNCTN[1:0]
Access	R/W	R/W	RO	RO	RO	RO	RO	RO
Reset	0	0	-	-	-	-	0	0


Bit	7	6	5	4	3	2	1	0
				DEVAD[4:0]
Access	RO	RO	RO	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 15:14 – FNCTN[1:0] MMD Function

This field specifies the action to be performed when reading or writing the MMD Access Address/Data register.

Value	Description
`00`	Address
`01`	Data - No post increment
`10`	Data - Post increment on reads and writes
`11`	Data - Post increment on writes only

Bits 4:0 – DEVAD[4:0] Device Address

Address of the MDIO Manageable Device to access.

Value	Description
`00001`	PMA/PMD
`00011`	PCS
`11111`	Vendor Specific 2
Others	Reserved - do not access

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.