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Registers
681
SPRUH91D–March 2013–Revised September 2016
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EMAC/MDIO Module
17.3.3.43 MAC Address Low Bytes Register (MACADDRLO)
The MAC address low bytes register used in address matching (MACADDRLO), is shown in Figure 17-81
and described in Table 17-80.
Figure 17-81. 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 17-80. 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)
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