gmacgrp_mac_address81_high 

          Register 642 (MAC Address81 High Register)   

The MAC Address81 High register holds the upper 16 bits of the 82nd 6-byte MAC address of the station.

If the MAC address registers are configured to be double-synchronized to the (G)MII clock domains, then
the synchronization is triggered only when Bits[31:24] (in little-endian mode) or Bits[7:0] (in big-endian mode) of the MAC Address81 Low Register are written. For proper synchronization updates, consecutive writes to this MAC Address81 Low Register must be performed after at least four clock cycles in the destination clock domain.
Module Instance Base Address Register Address
i_emac_emac0 0xFF800000 0xFF800A08
i_emac_emac1 0xFF802000 0xFF802A08
i_emac_emac2 0xFF804000 0xFF804A08

Size: 32

Offset: 0xA08

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

ae

RW 0x0

reserved_30_16

RO 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

addrhi

RW 0xFFFF

gmacgrp_mac_address81_high Fields

Bit Name Description Access Reset
31 ae 
Address Enable

When this bit is set, the address filter module uses the 82nd MAC address for perfect filtering. 
When this bit is reset, the address filter module ignores the address for filtering.
Value Description
0x0 DISABLED
0x1 ENABLED
RW 0x0
30:16 reserved_30_16 
Reserved
 RO 0x0
15:0 addrhi 
MAC Address81 [47:32]

This field contains the upper 16 bits (47:32) of the 82nd 6-byte MAC address.
 RW 0xFFFF