- 您现在的位置：买卖IC网 > PDF目录1888 > 78Q8430-100IGT/F (Maxim Integrated Products)IC LAN MEDIA ACCESS CTLR 100LQFP PDF资料下载
参数资料
| 型号： | 78Q8430-100IGT/F |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 27/88页 |
| 文件大小： | 0K |
| 描述： | IC LAN MEDIA ACCESS CTLR 100LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 90 |
| 控制器类型： | 以太网控制器，MAC/PHY |
| 电源电压： | 3.3V |
| 电流 - 电源： | 230mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-LQFP（14x14） |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页
DS_8430_001
78Q8430 Data Sheet
Rev. 1.2
33
Data Byte
WCS
CAM
Reference
Word
CAM Address
Control Signals
EOF
Figure 14: Classification Architecture
The CAM is a 128-word by 15-bit wide content addressable memory. When a reference data word is
applied to the CAM, the result is the highest numbered address that contains a data word that matches
the reference. Each data word contained in the CAM also contains 15 mask bits that conditionally disable
individual data bits from preventing a match. Address 0 is reserved and can never match such that no
reference data can ever result in a CAM address of zero. Address 1 is also reserved and always
matches such that a reference word that does not match any entry in the CAM will give a result of one.
Associated with each CAM entry is a control word. When a reference data word is presented to the CAM
and an address results, the control word associated with that address is passed to the control logic that
determines the next action taken by the packet classifier.
The control logic can execute any of the following actions:
Set the most significant byte of the pause counter.
Set the least significant byte of the pause counter.
Start the pause timer.
Cause the packet to be dropped.
Wake the host from power down mode (starts the HNR timer).
Interrupt the host.
Manipulate the classification result reported in the RPSR.
Identify multicast/broadcast frames for RMON statistics.
Identify the Len/Type field for frame size checking.
Identify the IP header for checksum checking.
To facilitate classification, the control logic contains a general purpose 8-bit register, ‘X’ and a 5-bit
counter, ‘C’. The ‘X’ register can be used to store a packet byte or a CAM result for later use. The
counter can be used as a loop index to iterate a set of rules a fixed number of times. The TOC action is
used to set the counter and the DEC action is used to decrement the counter. When a DEC action
causes the counter to expire, the loop is broken by decrementing the actual CAM address of the rule that
executed the DEC action for the purposes of the next CAM reference word. To prevent ambiguity, the
rule immediately below a rule that uses the DEC action should generally not be used.
Additionally, the control logic is responsible for generating the next 15-bit CAM match word by
concatenating the next 8-bit packet data byte or the ‘X’ register value with the 7-bit address of the current
CAM match. At the beginning of the packet, the previous CAM match is initialized to zero as is the
control logic ‘X’ register. The CAM address of zero is reserved and will never result from a CAM match
such that the first data byte in the frame is guaranteed to be the only byte that is accompanied by a zero
value for the previous hit. In other words, a CAM rule with a specified value for the previous hit of zero
will only match the first byte of the frame.
相关PDF资料 |
PDF描述 |
|---|---|
| A1020B-1CQ84C | IC FPGA 2K GATES 84-CQFP COM |
| A1225A-1PQ100C | IC FPGA 2500 GATES 100-PQFP COM |
| A1440A-1VQG100I | IC FPGA 4K GATES 100-VQFP |
| A3P1000-1FGG484T | IC FPGA 1KB FLASH 1M 484-FBGA |
| A3PE1500-PQG208 | IC FPGA 444I/O 208PQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 78Q8430-100IGTR/F | 功能描述:以太网 IC 10/100 Ethernet MAC & PHY RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| 78Q8430-128CGT/F | 制造商:Maxim Integrated Products 功能描述:Ethernet ICs 10/100 Ethernet MAC & PHY |
| 78Q8430-128CGTR/F | 制造商:Maxim Integrated Products 功能描述:Ethernet ICs 10/100 Ethernet MAC & PHY |
| 78Q8430-ARM9-EVM | 功能描述:EVALUATION MODULE 78Q8430 ARM9 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:* 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板 |
| 78Q8430EBST#DB | 功能描述:以太网开发工具 3-in-1 Silicon Delay Line RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
发布紧急采购，3分钟左右您将得到回复。