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參數資料
| 型號： | W89C880F |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 通信及網絡 |
| 英文描述： | 100Base-Tx/T4 Multiport Repeater Controller(100Base-Tx/T4多端口中繼器控制器) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP160 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁數： | 12/26頁 |
| 文件大小： | 313K |
| 代理商： | W89C880F |
W89C880F FastMPR
- 12 -
Collision and JAM Diagram
Start
Idle
One port is active
Command (AllXN) = copy
Command (N) = quiet
Command (all) = collision
JAM
Active
active node > 1
All is quite
active node > 1
All_Data_sent
and active node = 1
active node = 1
active node = 1
Reset or Power on
Figure 6
FastMPR Partition Diagram
Connect
Partition
State
Consecutive collision number > = 64
More than 512 bits are transmitted without collision or power on reset
Figure 7
Jabber Protection
The jabber protection function prevents reception of illegally long packets, which would degrade
network performance. When a FastMPR port receives a packet longer than 65536 bits, the jabber
function cuts the data frame, and the receive/transmit path of the port is disabled. Then no data
frame, regardless of whether it is from an input or output end, can pass through the port unless the
carrier on the port is no longer detected or the FastMPR is reset (by being switched off and then on
again). The jabber timer specification of Fast Ethernet is 40000
75000 bit times.
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