gmacgrp_mac_address99_high

          Register 678 (MAC Address99 High Register)

The MAC Address99 High register holds the upper 16 bits of the 6-byte 100th 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 Address99 Low Register are written. For proper synchronization updates, consecutive writes to this MAC Address99 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`	`0xFF800A98`
`i_emac_emac1`	`0xFF802000`	`0xFF802A98`
`i_emac_emac2`	`0xFF804000`	`0xFF804A98`

Size: 32

Offset: 0xA98

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_address99_high Fields

Bit

Name

Description

Access

Reset

ae

Address Enable

When this bit is set, the address filter module uses the 100th 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 Address99 [47:32]

This field contains the upper 16 bits (47:32) of the 100th 6-byte MAC address.

RW

0xFFFF