參數(shù)資料
型號： DS33Z11+
廠商： Maxim Integrated Products
文件頁數(shù)： 130/172頁
文件大?。?/td> 0K
描述： IC MAPPER ETHERNET 169-CSBGA
產品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 7
應用： 數(shù)據(jù)傳輸
接口： SPI/并聯(lián)
電源電壓： 1.8V, 3.3V
封裝/外殼： 169-LBGA，CSPBGA
供應商設備封裝： 169-CSBGA（14x14）
包裝： 托盤
安裝類型： 表面貼裝
產品目錄頁面： 1429 (CN2011-ZH PDF)
DS33Z11 Ethernet Mapper
60 of 172
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 8-14. 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.
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DS33Z11+ 功能描述:網(wǎng)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(wǎng)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(wǎng)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(wǎng)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(wǎng)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:
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