- 您现在的位置：买卖IC网 > PDF目录11585 > KSZ8841-16MQL (Micrel Inc)IC MAC CTRLR 8/16BIT 128-PQFP PDF资料下载
参数资料
| 型号： | KSZ8841-16MQL |
| 厂商： | Micrel Inc |
| 文件页数： | 33/105页 |
| 文件大小： | 0K |
| 描述： | IC MAC CTRLR 8/16BIT 128-PQFP |
| 标准包装： | 66 |
| 控制器类型： | 以太网控制器，MAC |
| 接口： | 总线 |
| 电源电压： | 3.1 V ~ 3.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-BFQFP |
| 供应商设备封装： | 128-PQFP（14x20） |
| 包装： | 托盘 |
| 产品目录页面： | 1080 (CN2011-ZH PDF) |
| 配用： | 576-1631-ND - BOARD EVALUATION KSZ8841-16MQL |
| 其它名称： | 576-2112 KSZ8841-16MQL-ND |
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页第27页第28页第29页第30页第31页第32页当前第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页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页
Micrel, Inc.
KSZ8841-16/32 MQL/MVL/MBL
October 2007
33
M9999-102207-1.6
control is based on availability of the system resources.
The KSZ8841M issues a flow control frame (Xoff, or transmitter off), containing the maximum pause time defined in IEEE
standard 802.3x. Once the resource is freed up, the KSZ8841M sends out the another flow control frame (Xon, or
transmitter on) with zero pause time to turn off the flow control (turn on transmission to the port). A hysteresis feature is
provided to prevent the flow control mechanism from being constantly activated and deactivated.
Half-Duplex Backpressure
A half-duplex backpressure option (non-IEEE 802.3 standards) is also provided. The activation and deactivation
conditions are the same as in full-duplex mode. If backpressure is required, the KSZ8841M sends preambles to defer the
other stations' transmission (carrier sense deference).
To avoid jabber and excessive deference (as defined in the 802.3 standard), after a certain time, the KSZ8841M
discontinues the carrier sense and then raises it again quickly. This short silent time (no carrier sense) prevents other
stations from sending out packets thus keeping other stations in a carrier sense deferred state. If the port has packets to
send during a backpressure situation, the carrier sense type backpressure is interrupted and those packets are
transmitted instead. If there are no additional packets to send, carrier sense type backpressure is reactivated again until
chip resources free up. If a collision occurs, the binary exponential back-off algorithm is skipped and carrier sense is
generated immediately, thus reducing the chance of further collision and carrier sense is maintained to prevent packet
reception.
Clock Generator
The X1 and X2 pins are connected to a 25MHz crystal. X1 can also serve as the connector to a 3.3V, 25MHz oscillator
(as described in the pin description).
The bus interface unit (BIU) uses BCLK (Bus Clock) for synchronous accesses. The maximum frequency is 50MHz for
VLBus-like and EISA-like slave direct memory access (DMA).
Bus Interface Unit (BIU)
The BIU host interface is a generic bus interface, designed to communicate with embedded processors. The use of glue
logic may be required when it talks to various standard buses and processors.
Supported Transfers
In terms of transfer type, the BIU can support two transfers: asynchronous transfer and synchronous transfer. To support
these transfers (asynchronous and synchronous), the BIU provides three groups of signals:
Synchronous signals
Asynchronous signals
Common signals are used for both synchronous and asynchronous transfers.
Since both synchronous and asynchronous signals are independent of each other, synchronous transfer and
asynchronous transfer can be mixed or interleaved but cannot be overlapped (due to the sharing of common signals).
Physical Data Bus Size
The BIU supports an 8-bit, 16-bit, or 32-bit host standard data bus. Depending on the size of the physical data bus, the
KSZ8841M supports 8-bit, 16-bit, or 32-bit data transfers
For example,
For a 32-bit system/host data bus, the KSZ8841M allows an 8-bit, 16-bit, and 32-bit data transfer (KSZ8841-32MQL).
For a 16-bit system/host data bus, the KSZ8841M allows an 8-bit and 16-bit data transfer (KSZ8841-16MQL).
For an 8-bit system/host data bus, the KSZ8841M only allows an 8-bit data transfer (KSZ8841-16MQL).
The KSZ8841M does not support internal data byte-swap but it does support internal data word-swap. This means that
the system/host data bus HD[7:0] must connect to both D[7:0] and D[15:8] for an 8-bit data bus interface. For a 16-bit data
bus, the system/host data bus HD[15:8] and HD[7:0] only need to connect to D[15:8] and D[7:0] respectively, and there is
no need to connect HD[15:8] and HD[7:0] to D[31:24] and D[23:16].
Table 2 describes the BIU signal grouping.
相关PDF资料 |
PDF描述 |
|---|---|
| PIC12CE518-04E/SM | IC MCU OTP 512X12 W/EE 8-SOIC |
| KSZ8895RQ | IC 10/100-T 5 PORT SW 128PQFP |
| PIC16LC620A-04/P | IC MCU OTP 512X14 COMP 18DIP |
| KSZ8863FLLI | IC ETHERNET SWITCH 3PORT 48-LQFP |
| PIC16C505-04E/SL | IC MCU OTP 1KX12 14SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ8841-16MQL A6 | 功能描述:IC MAC CTRLR 8/16BIT 128-PQFP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| KSZ8841-16MQL-EVAL | 功能描述:以太网开发工具 KSZ8841-16MQL Evaluation Board 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: |
| KSZ8841-16MVL | 功能描述:以太网 IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) 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 |
| KSZ8841-16MVL TR | 功能描述:以太网 IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) 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 |
| KSZ8841-16MVL-EVAL | 功能描述:BOARD EVALUATION KSZ8841-16MVL RoHS:是 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035 |
发布紧急采购，3分钟左右您将得到回复。