IP100A LF
Preliminary Data Sheet
68/97
March. 30, 2007
Copyright © 2004, IC Plus Corp.
IP100A LF-DS-R17
11.5.3 CarrierSenseErrors
Class............................. LAN I/O Registers, Statistics
Base Address ............... IoBaseAddress register value
Address Offset .............. 0x74
Default .......................... 0x00
Width ............................ 8 bits
BIT
BIT NAME
R/W
BIT DESCRIPTION
3..0
CarrierSenseErrors R/W
Carrier Sense Errors counts the number of times that the carrier
sense signal (CRS) was de-asserted (a logic 0) during the
transmission of a frame without collision. The carrier sense signal
is not monitored for the purpose of this statistic until after the
preamble and start-of-frame delimiter fields of the Ethernet frame
have been transmitted. CarrierSenseErrors will wrap around to
zero after reaching 0xFF. See IEEE 802.3 Clause 30.3.1.1.13.
An UpdateStats interrupt (UpdateStats bit within the IntStatus
register) will occur when CarrierSenseErrors reaches a value of
0xC0. CarrierSenseErrors is enabled by writing a logic 1 to the
StatisticsEnable bit in the MACCtrl1 register.
A read of CarrierSenseErrors also clears the register.
7..4
Reserved
R/W
Reserved for future use.
11.5.4 FramesAbortedDueToXSColls
Class............................. LAN I/O Registers, Statistics
Base Address ............... IoBaseAddress register value
Address Offset .............. 0x7b
Default .......................... 0x00
Width ............................ 8 bits
BIT
BIT NAME
R/W
BIT DESCRIPTION
7..0
FramesAborted-
DueToXSColls
R/W
Frames Aborted Due to Excess Collisions counts the number of
frames which are not transmitted successfully due to excessive
collisions. FramesAbortedDueToXSColls will wrap around to zero
after reaching 0xFF. See IEEE 802.3 Clause 30.3.1.1.11.
An UpdateStats interrupt (UpdateStats bit within the IntStatus
register) will occur when FramesAbortedDueToXSColls reaches a
value of 0xC0. FramesAbortedDueToXSColls is enabled by writing
a logic 1 to the StatisticsEnable bit in the MACCtrl1 register.
A read of FramesAbortedDueToXSColls also clears the register.
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
