參數(shù)資料
型號： DS33Z11
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 網絡接口
英文描述： Ethernet Mapper
中文描述： DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PBGA169
封裝： 14 X 14 MM, 1 MM PITCH, CSBGA-169
文件頁數(shù)： 59/169頁
文件大?。?/td> 1049K
代理商： DS33Z11
DS33Z11 Ethernet Mapper
59 of 169
8.19 Committed Information Rate Controller
The DS33Z11 provides a CIR provisioning facility. The CIR can be used restricts the transport of received MAC
data to a programmable rate. This is shown in
Figure 8-13
. The CIR will restrict the data flow from the Receive
MAC to Transmit HDLC. This can be used for provisioning and billing functions towards the WAN. The user must
set the CIR register to control the amount of data throughput from the MAC to HDLC transmit. The CIR register is
in granularity of 500 kbps with a range of 0 to 52 Mbps. The operation of the CIR is as follows:
The CIR block counts the credits that are accumulated at the end of every 125 ms
If data is received and stored in the SDRAM to be sent to the Serial Interface, the interface will request the
data if there is a positive credit balance. If the credit balance is negative, transmit interface does not
request data
New credit balance is calculated credit balance = old credit balance – frame size in bytes after the frame is
sent
The credit balance is incremented every 125 milliseconds by CIR/8
Credit balances not used in 250 milliseconds are reset to 0
The maximum value of CIR can not exceed the transmit line rate
If the data rate received from the Ethernet interface is higher than the CIR, the receive queue buffers will
fill and the high threshold watermark will invoke flow control to reduce the incoming traffic rate.
The CIR function is only available for software mode of operation only
CIR function is only available in data received at the Ethernet Interface to be sent to WAN. There is not
CIR functionality for data arriving from the WAN to be sent to the Ethernet Interface
Negative credits are not allowed, if there is not a credit balance, no frames are sent until there is a credit
balance again.
相關PDF資料
PDF描述
DS33ZH11 Ethernet Mapper
DS3803 1024K Flexible NV SRAM SIMM(1024K靈活的非易失性SRAM SIMM)
DS3903E-020 Triple 128-Position Nonvolatile Digital Potentiometer
DS3994 4-Channel Cold-Cathode Fluorescent Lamp Controller
DS4077 77.76MHz VCXO
相關代理商/技術參數(shù)
參數(shù)描述
DS33Z11+ 功能描述:網絡控制器與處理器 IC Ethernet Mapper RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS33Z11+UNUSED 功能描述:網絡控制器與處理器 IC Ethernet Mapper RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS33Z11DK 功能描述:以太網開發(fā)工具 DS33Z11 Dev Kit RoHS:否 制造商:Micrel 產品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓:
DS33Z41 功能描述:網絡控制器與處理器 IC Quad IMUX Ethernet Mapper RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS33Z41DK 功能描述:以太網開發(fā)工具 DS33Z41 Dev Kit RoHS:否 制造商:Micrel 產品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓:
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*