参数资料
型号: ZL50408GDC
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, MO-192, LBGA-208
文件页数: 98/144页
文件大小: 1779K
代理商: ZL50408GDC
ZL50408
Data Sheet
57
Zarlink Semiconductor Inc.
11.2.1.7
PortRunts
Counts number of frames received with size under 64 bytes, but greater than the length of a short event.
Use ZL50408 counter “Undersize Frames”, C[22].
11.2.1.8
PortCollisions
Counts number of collision events.
Use ZL50408 counter “Collision”, C[25].
11.2.1.9
PortLateEvents
Counts number of collision events that occurred late (after LateEventThreshold = 64 bytes).
Use ZL50408 counter “Port Late Collision”, C[29].
Note: when this counter is incremented, the ZL50408 also increments the “Collision” counter, C[25].
11.2.1.10
PortVeryLongEvents
Counts number of frames received with size larger than Jabber Lockup Protection Timer (TW3 = 5 ms or 50 000 bit
times – 20% + 50%).
No ZL50408 counter.
Note: the ZL50408 defines a jabber frame as any frame that exceeds 6400 bytes, however, the maximum buffer
size supported by the device is 4 KBytes. Thus, any frame > 4KB would be counted as an Oversized Frame, C[15].
Min. Frame Size
Max. Frame Size
Frame size:
> 10 bytes,
< 64 bytes
Framing error: don’t care
FCS error: don’t care
No collisions
Min. Frame Size
Max. Frame Size
Frame size:
any size
Min. Frame Size
Max. Frame Size
Frame size:
any size
Min. Frame Size
Max. Frame Size
Frame size:
> TW3
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