参数资料
| 型号： | KS8993 |
| 厂商： | Micrel Inc |
| 文件页数： | 14/35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） |
| 配用： | 576-1011-ND - BOARD EVAL EXPERIMENT FOR KS8993 |
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May 2005
21
KS8993
Micrel
MII Interface Operation
The MII (Media Independent Interface) operates in either a forward or reverse mode. In the forward mode, the KS8993 MII acts
like a MAC and in the reverse mode, it acts like a PHY device. This interface is specified by the IEEE 802.3 committee and
provides a common interface between physical layer and MAC layer devices. There are two distinct groups, one being for
transmission and the other for receiving. The table below describes the signals used in this interface in forward and reverse
modes.
This interface is a nibble wide data interface and therefore runs at 1/4 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 MII interface for the KS8993 for reverse operation and MTXER is not
represented for forward mode. Normally this would indicate a receive / transmit error coming from the physical layer /MAC
device, but is not appropriate for this configuration. If the connecting device has a MRXER pin, this should be tied low on the
other device for reverse or if it has a MTXER pin in the forward mode it should also be tied low on the other device.
Reverse MII Mode Connection
Forward MII Mode Connection
External MAC
KS8993 Signal
Description
External PHY
KS8993 Signal
MTXEN
Transmit enable
MTXEN
MRXDV
MTXER
Transmit error
MTXER
Not used
MTXD3
MTXD[3]
Transmit data bit 3
MTXD3
MRXD[3]
MTXD2
MTXD[2]
Transmit data bit 2
MTXD2
MRXD[2]
MTXD1
MTXD[1]
Transmit data bit 1
MTXD1
MRXD[1]
MTXD0
MTXD[0]
Transmit data bit 0
MTXD0
MRXD[0]
MTXC
MTXCLK
Transmit clock
MTXC
MTXCLK
MCOL
Collision detection
MCOL
MCOLIN
MCRS
Carrier sense
MCRS
MRXDV
Receive data valid
MRXDV
MTXEN
MRXER
Not used
Receive error
MRXER
MTXER
MRXD3
MRXD[3]
Receive data bit 3
MRXD3
MTXD[3]
MRXD2
MRXD[2]
Receive data bit 2
MRXD2
MTXD[2]
MRXD1
MRXD[1]
Receive data bit 1
MRXD1
MTXD[1]
MRXD0
MRXD[0]
Receive data bit 0
MRXD0
MTXD[0]
MRXC
MRXCLK
Receive clock
MRXC
MRXCLK
Table 2. MII Interconnect
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KS8993_09 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3-Port 10/100 Integrated Switch with PHY and Frame Buffer |
| KS8993-EVAL | 功能描述:BOARD EVAL EXPERIMENT FOR KS8993 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 |
| KS8993F | 功能描述:IC CONV MED 10/100 3PORT 128PQFP RoHS:是 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 |
| KS8993F-A1 | 功能描述:IC CONV MED 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 |
| KS8993FA5 | 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 |
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