參數(shù)資料
型號： KSZ8993MI
廠商： Micrel Inc
文件頁數(shù)： 26/86頁
文件大?。?/td> 0K
描述： IC SWITCH 10/100 W/TXRX 128PQFP
標(biāo)準(zhǔn)包裝： 66
系列： *
類型： *
應(yīng)用： *
安裝類型： 表面貼裝
封裝/外殼： 128-BFQFP
供應(yīng)商設(shè)備封裝： 128-PQFP（14x20）
包裝： 托盤
產(chǎn)品目錄頁面： 1081 (CN2011-ZH PDF)
其它名稱： 576-2124
KSZ8993MI-ND
Micrel, Inc.
KSZ8993M/ML
October 2008
32
M9999-020606
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 KSZ8993M has
an MRXER pin, it should be tied low. For MAC mode operation, if the device interfacing with the KSZ8993M 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 KSZ8993M acts like a PHY and the external controller functions as the MAC. The
KSZ8993M 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
KSZ8993M
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 KSZ8993M’s SCOL signal is used to indicate that a collision has occurred during
transmission.
MII Management Interface (MIIM)
The KSZ8993M 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
KSZ8993M. 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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KSZ8993ML-EVAL 功能描述:以太網(wǎng)開發(fā)工具 KSZ8993ML Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)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:
KSZ8993MLI 功能描述:以太網(wǎng) IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, 128-Ld PQFP(Lead Free, I-Temp) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
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KSZ8995FQ-EVAL 功能描述:以太網(wǎng)開發(fā)工具 Integrated 5-Port Switch with Fiber on Port 3 & 4 Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)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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