Rx Fifo Register Overview; Rx Fifo High Watermark Port 0 ($0X580); Rx Fifo High Watermark Port 1 ($0X581); Rx Fifo High Watermark Port 2 ($0X582) - Intel IXF1104 Datasheet

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Intel IXF1104 4-Port Gigabit Ethernet Media Access Controller
8.4.6

RX FIFO Register Overview

Table 113 through
FIFO High and Low watermarks.
Table 113. RX FIFO High Watermark Port 0 ($0x580)
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 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 114. RX FIFO High Watermark Port 1 ($0x581)
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 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
Table 115. RX FIFO High Watermark Port 2 ($0x582)
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 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
193
Table 131 provide an overview of the RX FIFO registers, which include the RX
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 water mark value.
NOTE: Must be greater than the RX FIFO Low
Watermark and RX FIFO transfer threshold.
Description
Reserved
The high water mark value.
NOTE: Must be greater than the RX FIFO Low
Watermark and RX FIFO transfer threshold.
1
Type Default
0x0E6
RO 0x00000
R/W 0x0E6
1
Type Default
0x0E6
RO 0x00000
R/W 0x0E6
1
Type Default
0x0E6
RO 0x00000
R/W 0x0E6

Datasheet

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