Rx Fifo Low Watermark Port 2 ($0X58C); Rx Fifo Low Watermark Port 3 ($0X58D); Rx Fifo Overflow Frame Drop Counter Ports 0 - 3 ($0X594 – 0X597); Datasheet - Intel IXF1104 Datasheet

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Intel IXF1104 4-Port Gigabit Ethernet Media Access Controller
2
Table 119. RX FIFO Low Watermark Port 2 ($0x58C)
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 2
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 120. RX FIFO Low Watermark Port 3 ($0x58D)
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 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 121. RX FIFO Overflow Frame Drop Counter Ports 0 - 3 ($0x594 – 0x597)
Name
RX FIFO Overflow
Frame Drop
Counter on port 0
RX FIFO Overflow
Frame Drop
Counter on port 1
RX FIFO Overflow
Frame Drop
Counter on port 2
RX FIFO Overflow
Frame Drop
Counter on 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
195
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.
Description
When RX FIFO on port 0 becomes full or
reset, the number of frames lost/dropped on
this port are shown in this register.
When RX FIFO on port 1 becomes full or
reset, the number of frames lost/dropped on
this port are shown in this register.
When RX FIFO on port 2 becomes full or
reset, the number of frames lost/dropped on
this port are shown in this register.
When RX FIFO on port 3 becomes full or
reset, the number of frames lost/dropped on
this port are shown in this register.
1
Type Default
0x072
RO 0x00000
R/W 0x072
1
Type Default
0x072
RO 0x00000
R/W 0x072
1
Address Type Default
0x594 R 0x00000000
0x595 R 0x00000000
0x596 R 0x00000000
0x597 R 0x00000000

Datasheet

Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005