参数资料
| 型号： | KS8993M |
| 厂商： | Micrel Inc |
| 文件页数： | 25/85页 |
| 文件大小： | 0K |
| 描述： | IC SWITCH 10/100 3PORT 128PQFP |
| 标准包装： | 66 |
| 系列： | * |
| 类型： | * |
| 应用： | * |
| 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： | 管件 |
| 配用： | 576-1013-ND - BOARD EVAL EXPERIMENT KS8993M |
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Micrel, Inc.
KS8993M/ML/MI
April 2005
31
M9999-041205
The MII interface operates in either PHY mode or MAC mode. The interface is a nibble wide data interfaces and
therefore run at the network bit rate (not encoded). Additional signals on the transmit side indicate when data is
valid or when an error occurs during transmission. Likewise, the receive side has indicators that convey when the
data is valid and without physical layer errors. For half duplex operation there is a signal that indicates a collision
has occurred during transmission.
Note that the signal MRXER is not provided on the interface for PHY mode operation and the signal MTXER is
not provided on the interface for MAC mode operation. Normally MRXER would indicate a receive error coming
from the physical layer device. MTXER would indicate a transmit error from the MAC device. These signals are
not appropriate for this configuration. For PHY mode operation, if the device interfacing with the KS8993M has an
MRXER pin, it should be tied low. For MAC mode operation, if the device interfacing with the KS8993M has an
MTXER pin, it should be tied low.
SNI (7-Wire) Operation
The serial network interface (SNI) or 7-wire is compatible with some controllers used for network layer protocol
processing. In SNI mode, the KS8993M acts like a PHY and the external controller functions as the MAC. The
KS8993M can interface directly with external controllers using the 7-wire interface. These signals are divided into
two groups, one for transmission and the other for reception. The signals involved are described in the following
table.
Pin Descriptions
External MAC
Controller Signals
KS8993M
PHY Signals
Transmit enable
TXEN
SMTXEN
Serial transmit data
TXD
SMTXD[0]
Transmit clock
TXC
SMTXC
Collision detection
COL
SCOL
Carrier sense
CRS
SMRXDV
Serial receive data
RXD
SMRXD[0]
Receive clock
RXC
SMRXC
Table 4. SNI Signals
The SNI interface is a bit wide data interface and therefore runs at the network bit rate (not encoded). An
additional signal on the transmit side indicates when data is valid. Similarly, the receive side has an indicator that
conveys when the data is valid.
For half duplex operation, the KS8993M’s SCOL signal is used to indicate that a collision has occurred during
transmission.
MII Management Interface (MIIM)
The KS8993M supports the IEEE 802.3 MII Management Interface, also known as the Management Data
Input/Output (MDIO) Interface. This interface allows upper-layer devices to monitor and control the states of the
KS8993M. An external device with MDC/MDIO capability can be used to read the PHY status or configure the
PHY settings. Further details on the MIIM interface can be found in section 22.2.4.5 of the IEEE 802.3
specification.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KS8993M_11 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:Integrated 3-Port 10/100 Managed Switch with PHYs |
| KS8993MA5 | 功能描述:IC SWITCH 3-PORT 10/100 128-PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| KS8993M-EVAL | 功能描述:BOARD EVAL EXPERIMENT KS8993M RoHS:否 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 |
| KS8993MI | 功能描述:IC SWITCH 10/100 3PORT 128PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
| KS8993ML | 功能描述:IC SWITCH 10/100 3PORT 128PQFP RoHS:否 类别:集成电路 (IC) >> 专用 IC 系列:* 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:调帧器 应用:数据传输 安装类型:表面贴装 封装/外壳:400-BBGA 供应商设备封装:400-PBGA（27x27） 包装:散装 |
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