HPIXF1104BE.B1-994579 Cortina Systems Inc, HPIXF1104BE.B1-994579 Datasheet - Page 69

• Manufacturer Part Number: HPIXF1104BE.B1-994579
• Description: IC ETH MAC SPI3 4PORT 552-BGA
• Manufacturer: Cortina Systems Inc

Specifications of HPIXF1104BE.B1-994579

• Controller Type: Ethernet Controller, MAC
• Interface: SPI-3
• Voltage - Supply: 1.2V, 2.5V, 3.3V
• Operating Temperature: -40°C ~ 85°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: 1008-1020

IXF1104 MAC
Datasheet
278757, Revision 13.2
17 September 2008
Figure 8
Figure 9
5.1.2.1.2
Cortina Systems
Ethernet Frame Format
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:
®
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
IXF1104 4-Port Gigabit Ethernet Media Access Controller
Note:
MAC requests the link partner to halt transmission for.
64 yte Minimum / 1518 bytes Maximum
Preamble
7
S
F
D
1
DA
6
SA
6
Length
Type/
2
Ethernet Frame
46-1500
Data
FCS
4
2277-02
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