Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X 데이터 시트
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제품 코드
DK-TM4C129X
Description
Reset
Type
Name
Bit/Field
Fast Link Down Modes
The Fast Link Down function is an OR of the following five options. The
application can enable combinations of these conditions.
application can enable combinations of these conditions.
Bit 4: Drop the link due to descrambler sync loss. If this bit is enabled,
the link is dropped when the receiver loses synchronization of the
transmitter.
the link is dropped when the receiver loses synchronization of the
transmitter.
Bit 3: Drop the link based on RX Error count of the MII interface. When
a predefined number of 32 RX Error occurrences in a 10μs interval is
reached, the link is dropped.
a predefined number of 32 RX Error occurrences in a 10μs interval is
reached, the link is dropped.
Bit 2: Drop the link based on MLT3 Errors count (Violation of the MLT3
coding in the DSP output). When a predefined number of 20 MLT3 Error
occurrences in a 10μs interval is reached, the link is dropped.
coding in the DSP output). When a predefined number of 20 MLT3 Error
occurrences in a 10μs interval is reached, the link is dropped.
Bit 1: Drop the link based on Low SNR Threshold. When a predefined
number of 20 Threshold crossing occurrences in a 10μs interval is
reached, the link is dropped.
number of 20 Threshold crossing occurrences in a 10μs interval is
reached, the link is dropped.
Bit 0: Drop the link based on Signal/Energy loss indication – When the
Energy detector indicates Energy Loss, the link is dropped. Typical
reaction time is 10μs.
Energy detector indicates Energy Loss, the link is dropped. Typical
reaction time is 10μs.
0x0
RW
FLDWNM
4:0
December 13, 2013
1806
Texas Instruments-Advance Information
Ethernet Controller