STMicroelectronics SPEAr300, Reference Manual

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RM0082 HS_Media independent interface (MII)
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24.7.30 MAC address1 high register (Register18, MAC)
The MAC Address1 High is a register which contains the upper 16 bits ([47:32]) of the 6-byte
2
nd
MAC address of the station. The MAC Address1 high bit assignments are given in
Table 460 .
● AE
Setting this bit, the MAC address filtering module uses the 2nd MAC address for perfect
filtering.
● SA
This bit allows to specify whether the MAC Address1 [47:0] is used to compare with the
SA fields (SA is 1'b1) or with the DA fields (SA is 1'b0) of the received frame.
● MBC
This 6 bit field controls masking of each of the MAC address byte, according to
encoding below:
Setting a bit, the corresponding byte of the received SA/DA is not compared with the
contents of MAC Address1 registers.
Table 459. MAC Address0 low register bit assignments
Bit Name Reset value Type Description
[31:00] A[31:0] 32’hFFFFFFFF RW MAC address0 [31:00].
Table 460. MAC Address1 high register bit assignments
Bit Name Reset Value Type Description
[31] AE 1’h0 RW Address Enable.
[30] SA 1’h0 RW Source Address.
[29:24] MBC 6’h0 RW Mask Byte Control.
[23:16] Reserved - RO Read: undefined.
[15:00] A[47:32] 16’hFFFF RW MAC Address1 [47:32].
Table 461. MAC address byte
Bit MAC Address Byte
[29] Register18[15:8]
[28] Register18[7:0]
[27] Register19[31:24]
[26] Register19[23:16]
[25] Register19[15:8]
[24] Register19[7:0]