gmacgrp_layer4_address0

         <b> Register 257 (Layer 4 Address Register 0) 
</b>

You can configure the Layer 3 and Layer 4 Address Registers to be double-synchronized by selecting the Synchronize Layer 3 and Layer 4 Address Registers to Rx Clock Domain option in coreConsultant. If the Layer 3 and Layer 4 Address Registers are configured to be double-synchronized to the Rx 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 Layer 3 and Layer 4 Address Registers are written. For proper synchronization updates, you should perform the consecutive writes to the same Layer 3 and Layer 4 Address Registers after at least four clock cycles delay of the destination clock.

If the Layer 3 and Layer 4 Filtering feature is not selected during core configuration, this register and registers 260 through 299 are reserved (RO with default value).

Module Instance	Base Address	Register Address
`i_emac_emac0`	`0xFF800000`	`0xFF800404`
`i_emac_emac1`	`0xFF802000`	`0xFF802404`
`i_emac_emac2`	`0xFF804000`	`0xFF804404`

Size: 32

Offset: 0x404

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
`l4dp0` `RW 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`l4sp0` `RW 0x0`

gmacgrp_layer4_address0 Fields

Bit	Name	Description	Access	Reset
31:16	`l4dp0`	Layer 4 Destination Port Number Field When Bit 16 (L4PEN0) is reset and Bit 20 (L4DPM0) is set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the TCP Destination Port Number field in the IPv4 or IPv6 frames. When Bit 16 (L4PEN0) and Bit 20 (L4DPM0) are set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the UDP Destination Port Number field in the IPv4 or IPv6 frames.	`RW`	`0x0`
15:0	`l4sp0`	Layer 4 Source Port Number Field Layer 4 Source Port Number Field When Bit 16 (L4PEN0) is reset and Bit 20 (L4DPM0) is set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the TCP Source Port Number field in the IPv4 or IPv6 frames. When Bit 16 (L4PEN0) and Bit 20 (L4DPM0) are set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the UDP Source Port Number field in the IPv4 or IPv6 frames.	`RW`	`0x0`

Bit

Name

Description

Access

Reset

31:16

l4dp0

Layer 4 Destination Port Number Field

When Bit 16 (L4PEN0) is reset and Bit 20 (L4DPM0) is set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the TCP Destination Port Number field in the IPv4 or IPv6 frames.

When Bit 16 (L4PEN0) and Bit 20 (L4DPM0) are set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the UDP Destination Port Number field in the IPv4 or IPv6 frames.

RW

0x0

15:0

l4sp0

Layer 4 Source Port Number Field

Layer 4 Source Port Number Field
When Bit 16 (L4PEN0) is reset and Bit 20 (L4DPM0) is set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the TCP Source Port Number field in the IPv4 or IPv6 frames.

When Bit 16 (L4PEN0) and Bit 20 (L4DPM0) are set in Register 256 (Layer 3 and Layer 4 Control Register 0), this field contains the value to be matched with the UDP Source Port Number field in the IPv4 or IPv6 frames.

RW

0x0