HFIXF1110CC.B3-998844 Cortina Systems Inc, HFIXF1110CC.B3-998844 Datasheet - Page 46

• Manufacturer Part Number: HFIXF1110CC.B3-998844
• Description: IC ETHERNET MAC 10PORT 552-CBGA
• Manufacturer: Cortina Systems Inc

Specifications of HFIXF1110CC.B3-998844

• Controller Type: Ethernet Controller, MAC
• Interface: SPI-4.2
• Voltage - Supply: 1.8 V, 2.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 575-BCBGA Exposed Pad (552 Bumps)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: 1008-1010

IXF1110 MAC
Datasheet
250210, Revision 11.0
13 April 2009
Figure 7
5.1.3.1.2
5.1.3.1.3
Cortina Systems
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.
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 + 0x07), on page
The IXF1110 MAC PAUSE frame transmission interval is set by the
($ Port_Index + 0x0E), on page
Response to Received PAUSE Command Frames
When Flow Control is enabled in the receive direction (bit 0 in the
+ 0x12), on page
from the link partner as follows:
®
Number of bytes
• 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
• Pause Threshold is the amount of time, measured in multiples of 512 bit times, prior to
IXF1110 10-Port 1000 Mbps Ethernet Media Access Controller
Note: In the IXF1110 architecture, the TX block of the MAC sets this as the pause multicast address.
MAC requests the link partner to halt transmission for.
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.
Preamble
127), the IXF1110 MAC responds to PAUSE Command frames received
7
D
S
F
1
C2-00-
DA* or
01-80-
00-01
125.
127.
6
SA
6
88-08
2
64 Bytes
Opcode
(00-01)
Pause
2
Length
Pause
FC TX Timer Value
5.1 Media Access Controller
46
2
FC Enable ($ Port_Index
Pause Threshold
(with 0s)
Pad
42
FCS
B3426-02
4
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