HFIXF1110CC.B2 Q E000 Intel, HFIXF1110CC.B2 Q E000 Datasheet - Page 70

• Manufacturer Part Number: HFIXF1110CC.B2 Q E000
• Manufacturer: Intel

Specifications of HFIXF1110CC.B2 Q E000

• 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

Intel
07-Oct-2005
70
®
Table 20. FIFO Status Format
IXF1110 10-Port 1000 Mbps Ethernet Media Access Controller
Note:
The indicated FIFO status is based on the latest available information. A STARVING indication
provides additional feedback information, so that transfers are scheduled accordingly. Applications
that do not distinguish between HUNGRY and STARVING may only examine the most significant
FIFO status bit.
If a port is disabled on the IXF1110 MAC, FIFO status for the port is set to SATISFIED to avoid
the possibility of any data being sent to it by the controlling device. This applies to the IXF1110
MAC transmit path.
Upon reset, the FIFOs in the data path receiver are emptied, and any outstanding credits are cleared
in the data path transmitter. After reset, and before active traffic is generated, the data transmitter
sends continuous training patterns. Transmission of the training patterns continues until valid
information is received on the FIFO Status channel. The receiver ignores all incoming data until it
has observed the training pattern and acquired synchronization with the data. Synchronization may
be declared after a provisional number of consecutive correct DIP-4 code words is seen. Loss of
synchronization may be reported after a provisional number of consecutive DIP-4 code words is
detected. [For details, see
The DIP-4 thresholds are programmable. However, there is a potential issue with the possibility of
a given link showing DIP-4 errors that may never lose synchronization and re-train to fix the issue.
This would mean an on-going and potentially significant loss of data on the link affecting all ports
transferring data at that time.
This issue may be seen in the following two instances:
MSB
•
•
1
1
0
0
During training (most likely periodic training)
During data transfers where each of the data transfers (MaxBurst1 or MaxBurst2) are
separated by more than one idle control word
LSB
1
0
1
0
Intel
®
Reserved for framing or to indicate a disabled status link.
SATISFIED: Indicates that the corresponding port's FIFO is almost full. When SATISFIED is
received, only transfers using the remaining previously granted 16-byte blocks (if any) may
be sent to the corresponding port until the next status update. No additional transfers to that
port are permitted while SATISFIED is indicated.
HUNGRY: When HUNGRY is received, transfers for up to MaxBurst2 16-byte blocks, or the
remainder of what was previously granted (whatever is greater), may be sent to the
corresponding port until the next status update.
STARVING: Indicates that buffer underflow is imminent in the corresponding PHY port.
When STARVING is received, transfers for up to MaxBurst1 16-byte blocks may be sent to
the corresponding port until the next status update
IXF1110 10-Port 1000 Mbps Ethernet Media Access Controller
Order Number: 250210, Revision: 009
Table 104, “SPI4-2 TX Synchronization ($ 0x703)” on page
Description
175.]
Datasheet