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| 型号： | KSZ8051RNL TR |
| 厂商： | Micrel Inc |
| 文件页数： | 17/59页 |
| 文件大小： | 0K |
| 描述： | TXRX PHY 10/T100 3.3V RMII 32QFN |
| 特色产品： | KSZ8051/8031/8021 Series |
| 标准包装： | 1 |
| 类型： | PHY 收发器 |
| 驱动器/接收器数： | 1/1 |
| 规程： | RMII |
| 电源电压： | 1.8V，2.5V，3.3V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 标准包装 |
| 其它名称： | 576-3778-6 |
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Micrel, Inc.
KSZ8051MNL/RNL
July 2010
24
M9999-070910-1.0
RMII Data Interface (KSZ8051RNL only)
The Reduced Media Independent Interface (RMII) specifies a low pin count Media Independent Interface (MII). It provides
a common interface between physical layer and MAC layer devices, and has the following key characteristics:
Pin count is 8 pins (3 pins for data transmission, 4 pins for data reception, 1 pin for the 50MHz reference clock).
10Mbps and 100Mbps data rates are supported at both half and full duplex.
Data transmission and reception are independent and belong to separate signal groups.
Transmit data and receive data are each 2-bit wide, a dibit.
RMII – 25MHz Clock Mode
The KSZ8051RNL is configured to RMII – 25MHz Clock Mode after it is powered up or hardware reset with the following:
A 25MHz crystal connected to XI, XO (pins 9, 8), or an external 25MHz clock source (oscillator) connected to XI.
The CONFIG[2:0] strapping pins (pins 18, 29, 28) set to ‘001’.
Register 1Fh, bit 7 is set to ‘0’ (default value) to select 25MHz Clock Mode.
RMII – 50MHz Clock Mode
The KSZ8051RNL is configured to RMII – 50MHz Clock Mode after it is powered up or hardware reset with the following:
An external 50MHz clock source (oscillator) connected to XI (pin 9).
The CONFIG[2:0] strapping pins (pins 18, 29, 28) set to ‘001’.
Register 1Fh, bit 7 is set to ‘1’ to select 50MHz Clock Mode.
RMII Signal Definition
The following table describes the RMII signals. Refer to RMII Specification v1.2 for detailed information.
RMII
Signal Name
Direction
(with respect to PHY,
KSZ8051RNL signal)
Direction
(with respect to
MAC)
Description
REF_CLK
Output (25MHz clock mode) /
<no connect> (50MHz clock
mode)
Input /
Input or <no connect>
Synchronous 50 MHz reference clock for
receive, transmit and control interface
TXEN
Input
Output
Transmit Enable
TXD[1:0]
Input
Output
Transmit Data [1:0]
CRS_DV
Output
Input
Carrier Sense/Receive Data Valid
RXD[1:0]
Output
Input
Receive Data [1:0]
RXER
Output
Input, or (not
required)
Receive Error
Table 2. RMII Signal Description
Reference Clock (REF_CLK)
REF_CLK is a continuous 50MHz clock that provides the timing reference for TX_EN, TXD[1:0], CRS_DV, RXD[1:0], and
RX_ER.
For 25MHz Clock Mode, the KSZ8051RNL generates and outputs the 50MHz RMII REF_CLK to the MAC at REF_CLK
(pin 19).
For 50MHz Clock Mode, the KSZ8051RNL takes in the 50MHz RMII REF_CLK from the MAC or system board at XI (pin
9) and has the REF_CLK (pin 19) left as a no connect.
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| KSZ8051RNLU TR | 功能描述:以太网 IC Single-Port 10/100BT PHY (Automotive) 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 |
| KSZ8051RNLU-TR | 功能描述:1/1 Transceiver Full RMII 32-QFN (5x5) 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:停产 类型:收发器 协议:RMII 驱动器/接收器数:1/1 双工:全 接收器滞后:- 数据速率:- 电压 - 电源:1.8V，2.5V，3.3V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:32-VFQFN 裸露焊盘 供应商器件封装:32-QFN（5x5） 标准包装:1 |
| KSZ8081MLXCA | 功能描述:以太网 IC 10/100 PHY, 0.11u 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 |
| KSZ8081MLXCA TR | 功能描述:以太网 IC 10/100 PHY, 0.11u 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 |
| KSZ8081MLXCATR | 制造商:Micrel Inc 功能描述:Ethernet Transceiver,PHY,MII,LQFP48 |
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