參數(shù)資料
型號(hào)： TC6216M
廠商： Electronic Theatre Controls, Inc.
英文描述： 16 Port 10/100 Unmanaged QoS Ethernet Switch
中文描述： 非網(wǎng)管16端口10/100以太網(wǎng)交換機(jī)的QoS
文件頁數(shù)： 13/28頁
文件大?。?/td> 568K
代理商： TC6216M
TC6216M
- 13 -
Ver. 2.1
5/24/01
limited to a maximum of 30 collisions if this option is selected. The default number of consecutive collisions can
be changed by EEPROM settings. This feature can be used to avoid HUB partitioning.
MAC Block Diagram
8
Traffic Priority
TC6216M supports advanced traffic priority features (QoS). It provides three levels of priority: normal, high
and very high priority. Each class of priority has its dedicated queue for each transmission port. Packets in
priority mode (high or very high priority) will arrive sooner at the destination MAC address. When all (3)
priority queues for the same port are not empty the transmission bandwidth is used around 8% for the low
priority queue, 30% for high priority and 62% for very high priority queue. The bandwidth distribution when one
of the queues is empty can be observed in the table below:
Transmission Bandwidth Utilization Factor
Normal (Low)
Priority
X
11%
20%
8%
Priority Queues
IF Empty
High Priority
33%
X
80%
30%
Very High
Priority
66%
89%
X
62%
Normal
High
Very High
None
These priority rules apply for all ports and are independent of the port
′
s speed mode or duplex mode.
A special packet dropping mechanism is also implemented to offer more protection against overflow conditions
for priority packets. If the packet memory load is exceeding an overflow threshold then all normal priority
packets will be dropped on source port basis in order to save space for the priority packets. This will minimize
the probability of packet loss in priority flows for senders that are not flow-control capable.
Rx FIFO
Rx MAC
Tx MAC
Flow
Control
Tx FIFO
Fifo Control Logic
Control
Logic
System Interface
MAC
RMII
PHY Layer
RM II Rx D ata (2)
Tx D ata (64)
FC Insert
Tim e Value (16)
Rx D ata (64)
RM II Tx D ata (2)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC621CCOA 功能描述:板上安裝溫度傳感器 Ext Sensor C Opt. RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
TC621CCOA713 功能描述:板上安裝溫度傳感器 Ext Sensor C Opt. RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
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TC621CEOA 功能描述:板上安裝溫度傳感器 Ext Sensor C Opt. RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
TC621CEOA713 功能描述:板上安裝溫度傳感器 Ext Sensor C Opt. RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor
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