Ethernet MAC (EMAC) RegistersBCM5718 Programmer’s Guide
Broadcom®
January 29, 2016 • 5718-PG108-R Page 316
WOL Pattern Pointer Register (offset: 0x430)
WOL Pattern Configuration Register (offset: 0x434)
Ethernet Transmit Random Backoff Register (offset: 0x438)
Receive MTU Size Register (offset: 0x43C)
Name Bits Access
Default
Value
Description
Reserved 31:9 RO 0 –
ACPI Pointer 8:0 RW 0 Specifies the offset into the 6 KB BD memory for
frame comparison. (Bits 3:0 are ignored to align
the memory address to a natural 128-bit
boundary).
Name Bits Access
Default
Value
Description
Reserved 31:28 RO 0 –
ACPI Offset 27:16 RW 0 Offset of a frame where the pattern comparison
starts.
Reserved 15:10 RO 0 –
ACPI Length 9:0 RW 0 Specifies the total number of 64-bit double words
inside the MISC_BD memory that are valid for
ACPI.
For GMII, it should have a value of 2, 4, 6,…
For MII, it should have a value of 3, 6, 9, …
Name Bits Access
Default
Value
Description
Reserved 31:10 RO 0 –
Random Backoff Seed 9:0 RW 0 For half-duplex, initialize with any nonzero seed.
Name Bits Access
Default
Value
Description
Reserved 31:16 RO 0 –
MTU 15:0 RW 05F2h 2-byte field which is the largest size frame that
will be accepted without being marked as
oversize.
Note: If the MTU value in register 0x43C[15:0] is greater than the value in 0x2458[15:2], then the driver
MUST configure jumbo frame support and fill the jumbo receive producer rings.
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