Texas Instruments TMS320C674X MAC Address Low Bytes Register MACADDRLO, EMAC Module Registers

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5.43 MAC Address Low Bytes Register (MACADDRLO)

The MAC address low bytes register used in address matching (MACADDRLO), is shown in Figure 81 and described in Table 80.

Figure 81. MAC Address Low Bytes Register (MACADDRLO)

31			21	20	19	18	16
	Reserved			VALID	MATCHFILT		CHANNEL
	R-0			R/W-x	R/W-x		R/W-x
15	8	7					0
	MACADDR0				MACADDR1
	R/W-x				R/W-x

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset; -x = value is indeterminate after reset

Table 80. MAC Address Low Bytes Register (MACADDRLO) Field Descriptions

Bit	Field	Value	Description
31-21	Reserved	0	Reserved
20	VALID		Address valid bit. This bit should be cleared to zero for unused address channels
		0	Address is not valid and will not be used for matching or filtering incoming packets
		1	Address is valid and will be used for matching or filtering incoming packets
19	MATCHFILT		Match or filter bit
		0	The address will be used (if the VALID bit is set) to filter incoming packet addresses
		1	The address will be used (if the VALID bit is set) to match incoming packet addresses
18-16	CHANNEL	0-7h	Channel select. Determines which receive channel a valid address match will be transferred to. The
			channel is a don't care if MATCHFILT is cleared to 0.
15-8	MACADDR0	0-FFh	MAC address lower 8-0 bits (byte 0)
7-0	MACADDR1	0-FFh	MAC address bits 15-8 (byte 1)

120	EMAC/MDIO Module	SPRUFL5B –April 2011
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