Mac Address Low Bytes Register (Macaddrlo) - Texas Instruments AM1808 Technical Reference Manual

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18.3.3.43 MAC Address Low Bytes Register (MACADDRLO)

The MAC address low bytes register used in address matching (MACADDRLO), is shown in
and described in Table
31
15
MACADDR0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset; -x = value is indeterminate after reset
Table 18-80. MAC Address Low Bytes Register (MACADDRLO) Field Descriptions
Bit Field
31-21 Reserved
20 VALID
19 MATCHFILT
18-16 CHANNEL
15-8 MACADDR0
7-0 MACADDR1
SPRUH82C – April 2013 – Revised September 2016
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18-80.
Figure 18-81. MAC Address Low Bytes Register (MACADDRLO)
Reserved
R-0
R/W-x
Value Description
0 Reserved
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
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
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.
0-FFh MAC address lower 8-0 bits (byte 0)
0-FFh MAC address bits 15-8 (byte 1)
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21 20
VALID
R/W-x
8 7
Registers
Figure 18-81
19 18
MATCHFILT CHANNEL
R/W-x R/W-x
MACADDR1
R/W-x
EMAC/MDIO Module
16
0
821