HFIXF1110CC Intel, HFIXF1110CC Datasheet - Page 49

• Manufacturer Part Number: HFIXF1110CC
• Manufacturer: Intel

Specifications of HFIXF1110CC

• Number Of Transceivers: 1
• Screening Level: Commercial
• Mounting: Surface Mount
• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Lead Free Status / RoHS Status: Not Compliant

Datasheet
Figure 7. PAUSE Frame Format
An IEEE 802.3 MAC PAUSE frame is identified by detecting all of the following:
XOFF. A PAUSE frame informs the link partner to halt transmission for a specified length of time.
The PauseLength octets specify the duration of the no-transmit period. If this time is greater than
zero, the link partner must stop sending any further packets until this time has elapsed. This is
referred to as XOFF.
XON. The MAC continues to transmit PAUSE frames with the specified Pause Length as long as
the FIFO level exceeds the threshold. If the FIFO level falls below the threshold before the Pause
Length time expires, the MAC sends another PAUSE frame with the Pause Length time specified
as zero. This is referred to as XON and informs the link partner to resume normal transmission of
packets.
5.1.3.1.2 Pause Settings
The MAC must send PAUSE frames repeatedly to maintain the link partner in a Pause state. The
following two inter-related variables control this process:
The transmitted Pause Length in the IXF1110 MAC is set by the
Port_Index +
The IXF1110 MAC PAUSE frame transmission interval is set by the
Port_Index + 0x0E)” on page
Number of bytes
•
•
•
•
•
Note: In the Intel
OpCode of 00-01
Length/Type field of 88-08
DA matching the unique multicast address (01-80-C2-00-00-01)
Pause Length is the amount of time, measured in multiples of 512 bit times, that the MAC
requests the link partner to halt transmission for.
Pause Threshold is the amount of time, measured in multiples of 512 bit times, prior to the
expiration of the Pause Length that the MAC transmits another Pause frame to maintain the
link partner in the pause state.
The RX interface of the MAC will process this as the pause multicast or the MAC address.
Intel
0x07)".
®
IXF1110 10-Port 1000 Mbps Ethernet Media Access Controller
®
Preamble
IXF1110 architecture, the TX block of the MAC sets this as the pause multicast address.
7
Order Number: 250210, Revision: 009
S
F
D
1
135.
DA* or
C2-00-
01-80-
00-01
Intel
6
®
IXF1110 10-Port 1000 Mbps Ethernet Media Access Controller
SA
6
88-08
2
64 Bytes
Opcode
(00-01)
Pause
2
“FC TX Timer Value ($
“Pause Threshold ($
Length
Pause
46
2
(with 0s)
Pad
42
07-Oct-2005
FCS
B3426-02
4
49