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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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