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EMAC Port Registers
5.43 MAC Address Low Bytes Register (MACADDRLO)
The MAC address low bytes register (MACADDRLO) is shown in Figure 85 and described in Table 79.
Figure 85. MAC Address Low Bytes Register (MACADDRLO)
31 21 20 19 18 16
MATCH
Reserved VALID CHANNEL
FILT
R-0 R/W-x R/W-x R/W-x
15 8 7 0
MACADDR0 MACADDR1
R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 79. 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 RAM locations.
0 Address location is not valid and will not be used in determining whether or not an incoming packet
matches or is filtered
1 Address location is valid and will be used in determining whether or not an incoming packet
matches or is filtered
19 MATCHFILT Match or filter bit
0 The address will be used (if VALID is set) to determine if the incoming packet address should be
filtered
1 The address will be used (if VALID is set) to determine if the incoming packet address is a match
18-16 CHANNEL Channel bit; determines which receive channel a valid address match will be transferred to. The
channel is a don't care if the MATCHFILT bit is cleared to zero.
15-8 MACADDR0 MAC address lower 8 bits (byte 0)
7-0 MACADDR1 MAC address bits 15-8 (byte 1)
141
SPRUEF8F–March 2006–Revised November 2010 C6472/TCI6486 EMAC/MDIO
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