Intel
®
IXF1104 4-Port Gigabit Ethernet Media Access Controller
Datasheet
204
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
Table 133. TX FIFO Low Watermark Register Ports 0 - 3 ($0x60A – 0x60D)
Name
Description
Address
Type
1
Default
TX FIFO Low
Watermark Port 0
Low watermark for TX FIFO Port 0.
The
default value of 0x0D0 represents 208 8-byte
locations. This equates to 1664 bytes of data. A
unit entry in this register equates to 8 bytes of
data. When the amount of data stored in the TX
FIFO falls below the low watermark, flow control
is automatically de-asserted on the SPI3
interface to allow further data to be sent by the
switch fabric to the IXF1104 MAC.
0x60A
R/W
0x000000D0
TX FIFO Low
Watermark Port 1
Low watermark for TX FIFO Port 1.
The
default value of 0x0D0 represents 208 8-byte
locations. This equates to 1664 bytes of data. A
unit entry in this register equates to 8 bytes of
data. When the amount of data stored in the TX
FIFO falls below the low watermark, flow control
is automatically de-asserted on the SPI3
interface to allow further data to be sent by the
switch fabric to the IXF1104 MAC.
0x60B
R/W
0x000000D0
TX FIFO Low
Watermark Port 2
Low watermark for TX FIFO Port 2.
The
default value of 0x0D0 represents 208 8-byte
locations. This equates to 1664 bytes of data. A
unit entry in this register equates to 8 bytes of
data. When the amount of data stored in the TX
FIFO falls below the low watermark, flow control
is automatically de-asserted on the SPI3
interface to allow further data to be sent by the
switch fabric to the IXF1104 MAC.
0x60C
R/W
0x000000D0
TX FIFO Low
Watermark Port 3
Low watermark for TX FIFO Port 3.
The
default value of 0x0D0 represents 208 8-byte
locations. This equates to 1664 bytes of data. A
unit entry in this register equates to 8 bytes of
data. When the amount of data stored in the TX
FIFO falls below the low watermark, flow control
is automatically de-asserted on the SPI3
interface to allow further data to be sent by the
switch fabric to the IXF1104 MAC.
0x60D
R/W
0x000000D0
1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No
clear; R/W/C = Read/Write, Clear on Write