参数资料
型号: CORE10/100-RM
厂商: Microsemi SoC
文件页数: 60/106页
文件大小: 0K
描述: IP CORE10/100 ETHERNET MAC
标准包装: 1
系列: *
Software Interface
Core10100 v4.0
Collision Handling
Collision detection is performed via the col input port. If a collision is detected before the end of the PREAMBLE/
SFD, Core10100 completes the PREAMBLE/SFD, transmits the JAM sequence, and initiates a backoff computation.
If a collision is detected after the transmission of the PREAMBLE and SFD, but prior to 512 bits being transmitted,
Core10100 immediately aborts the transmission, transmits the JAM sequence, and then initiates a backoff. If a collision
is detected after 512 bits have been transmitted, the collision is termed a late collision. Core10100 aborts the
transmission and appends the JAM sequence. The transmit message is flushed from the FIFO. Core10100 does not
initiate a backoff and does not attempt to retransmit the frame when a late collision is detected.
Core10100 uses a “truncated binary exponential backoff ” algorithm for backoff computing, as defined in the IEEE 802.3
standard and outlined in Figure 4-13 .
Backoff processing is performed only in half-duplex mode. In full-duplex mode, collision detection is disabled.
Reset Attempt
Transmission
Ready
Yes
Wait for End of
Transmission
No
Normal
Collision?
No
Late Collision?
Y es
Set TDES0.9 (LC)
Late Collision
Yes
Increment Attempt
No
Attempt < 16
Yes
No
Set TDES0.8 (EC)
Excessive Collision
Yes
ran = random(0..2 attempt – 1)
Attempt < 10
No
ran = random(0..2 10 – 1)
Wait for ran * Slot Time
Next Transmission
Attempt
Figure 4-13 · Backoff Process Algorithms
60
v4.0
相关PDF资料
PDF描述
M3CMK-2040K IDC CABLE - MKC20K/MC20F/MCG20K
M3AMK-2040K IDC CABLE - MSC20K/MC20F/MCG20K
M3UUK-4020K IDC CABLE - MKS40K/MC40F/MKS40K
BQ26221PWG4 IC BATTERY MONITOR HP 8-TSSOP
MAX6328UR29+T IC MPU/RESET CIRC 2.93V SOT23-3
相关代理商/技术参数
参数描述
CORE10GMAC-OM 功能描述:HW/SW/OTHER 制造商:microsemi corporation 系列:* 零件状态:在售 标准包装:1
CORE10GMAC-OMFL 功能描述:HW/SW/OTHER 制造商:microsemi corporation 系列:* 零件状态:在售 标准包装:1
CORE12X4 制造商:Bogen Communications 功能描述:12 X 4 MATRIX CONTROLLER
CORE1553BBC-AN 功能描述:IP MODULE CORE1553 BUS CTLR RoHS:否 类别:编程器,开发系统 >> 软件 系列:* 标准包装:1 系列:ISE® 设计套件 类型:订阅 适用于相关产品:Xilinx FPGAs 其它名称:Q4986209T1081384
CORE1553BBC-AR 功能描述:IP MODULE CORE1553 BUS CTLR RoHS:否 类别:编程器,开发系统 >> 软件 系列:* 标准包装:1 系列:ISE® 设计套件 类型:订阅 适用于相关产品:Xilinx FPGAs 其它名称:Q4986209T1081384