Rx Fifo High Watermark Port 3 ($0X583); Rx Fifo Low Watermark Port 0 ($0X58A); Rx Fifo Low Watermark Port 1 ($0X58B); Datasheet - Intel IXF1104 Datasheet

Table 116. RX FIFO High Watermark Port 3 ($0x583)
Bit Name
Register Description: The default value of 0x0E6 represents 230 eight-byte locations. This
equates to 1840 bytes of data. A unit entry in this register equates to 8 bytes of data. When the
amount of data stored in the RX FIFO exceeds the high watermark, flow control is
automatically initiated within the MAC to avoid an overflow condition.
31:12 Reserved
RX FIFO High
11: 0
Watermark Port 3
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
Table 117. RX FIFO Low Watermark Port 0 ($0x58A)
Bit Name
Register Description: The default value of 0x072 represents 114 eight-byte locations. This
equates to 912 bytes of data. A unit entry in this register equates to 8 bytes of data. When the
amount of data stored in the RX FIFO falls below the Low Watermark, flow control is
automatically de-asserted within the MAC to allow more line-side data to be captured by the
RX FIFO.
31:12 Reserved
RX FIFO Low
11: 0
Watermark Port 0
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
Table 118. RX FIFO Low Watermark Port 1 ($0x58B)
Bit Name
Register Description: The default value of 0x072 represents 114 eight-byte locations. This
equates to 912 bytes of data. A unit entry in this register equates to 8 bytes of data. When the
amount of data stored in the RX FIFO falls below the Low Watermark, flow control is
automatically de-asserted within the MAC to allow more line-side data to be captured by the
RX FIFO.
31:12 Reserved
RX FIFO Low
11: 0
Watermark Port 1
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

Datasheet

Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
®
Intel IXF1104 4-Port Gigabit Ethernet Media Access Controller
Description
Reserved
The high water mark value.
NOTE: Must be greater than the RX FIFO Low
Watermark and RX FIFO transfer threshold.
Description
Reserved
The High Watermark value
NOTE: Should never be greater or equal to the
High Watermark.
Description
Reserved
The High Watermark value
NOTE: Should never be greater or equal to the
High Watermark.
1
Type Default
0x0E6
RO 0x00000
R/W 0x0E6
1
Type Default
0x072
RO 0x00000
R/W 0x072
1
Type Default
0x072
RO 0x00000
R/W 0x072
194