代码收藏家 《深入浅出：使用RTL8211网络接口卡的指南》
1 概述
Realtek（瑞昱半导体）公司的 RTL8211F-CG/RTL8211FD-CG/RTL8211FI-CG/RTL8211FDI-CG是符合10Base-T，100Base-TX和1000Base-T IEEE 802.3标准的高度集成的以太网收发器。它提供了通过CAT.5 UTP电缆发送和接收以太网数据包的所有必要的物理层功能。 RTL8211FI和RTL8211FDI符合工业级标准。
RTL8211F(I)/RTL8211FD(I)使用先进DSP和模拟前端（AFE）技术，通过UTP电缆实现高速数据传输。在RTL8211F(I)/RTL8211FD(I)中实现诸如交叉检测和自动校正，极性校正，自适应均衡，串扰消除，回波消除，定时恢复和纠错的功能，以提供在10Mbps，100Mbps或1000Mbps时鲁棒发送和接收能力。
MAC和PHY之间的1000Base-T，10Base-T和100Base-TX数据传输是通过RGMII接口实现的。RTL8211F(I)/RTL8211FD(I)支持多种RGMII信号电压，包括3.3，2.5，1.8和1.5V。
2 RTL8211F-CG特征：
3 系统应用
此外，RTL8211F(I)/RTL8211FD(I)可用于任何需要UTP物理连接的以太网MAC的嵌入式系统。
3.1 RTL8211F(I)应用框图
3.2 RTL8211FD(I)应用框图
4 系统框图
5 管脚图
6 管脚说明
|
Interace |
Pin No. |
Pin name |
Type |
Description |
|
Transceiver Interface |
1 |
MDIP0 |
IO |
the BI_DA+/- pair |
|
2 |
MDIN0 |
IO |
||
|
4 |
MDIP1 |
IO |
the BI_DB+/- pair, |
|
|
5 |
MDIN1 |
IO |
||
|
6 |
MDIP2 |
IO |
the BI_DC+/- pair. |
|
|
7 |
MDIN2 |
IO |
||
|
9 |
MDIP3 |
IO |
the BI_DD+/- pair. |
|
|
10 |
MDIN3 |
IO |
||
|
CLOCK |
36 |
XTAL_IN |
I |
25MHz Crystal Input. |
|
37 |
XTAL_OUT/EXT_CLK |
O |
25MHz Crystal Output. |
|
|
35 |
CLKOUT |
O |
125/25MHz Reference Clock |
|
|
RGMII |
20 |
TXC |
I |
transmit reference clock |
|
18 |
TXD0 |
I |
Transmit Data. Data is transmitted from MAC to PHY via TXD[3:0].
|
|
|
17 |
TXD1 |
I |
||
|
16 |
TXD2 |
I |
||
|
15 |
TXD3 |
I |
||
|
19 |
TXCTL |
I |
Transmit Control Signal from the MAC |
|
|
27 |
RXC/PHYAD1 |
O |
The continuous receive reference clock |
|
|
25 |
RXD0/RXDLY |
O |
Receive Data. Data is transmitted from PHY to MAC via RXD[3:0]. |
|
|
24 |
RXD1/TXDLY |
O |
||
|
23 |
RXD2/PLLOFF |
O |
||
|
22 |
RXD3/PHYAD0 |
O |
||
|
26 |
RXCTL/PHYAD2 |
O |
Receive Control Signal to the MAC |
|
|
Management Interface |
13 |
MDC |
I |
Management Data Clock |
|
14 |
MDIO |
IO/PU |
Input/Output of Management Data |
|
|
31 |
INTB/PMEB |
O/OD |
Interrupt / Power Management Event |
|
|
Reset |
12 |
PHYRSTB |
I |
Hardware Reset. Active low. |
|
LED |
32 |
LED0/CFG_EXT |
O |
High=Link Up at 10/100/1000Mbps |
|
33 |
LED1/CFG_LDO0 |
O |
||
|
34 |
LED2/CFG_LDO1 |
O |
||
|
Regulator and Reference |
39 |
RSET |
O |
Reference (External Resistor Reference). |
|
30 |
REG_OUT/LDO_OUT |
O |
For RTL8211F(I): Switching Regulator 1.0V Output. Connect to a 2.2µH or 4.7µH inductor. |
|
|
Power and Ground |
29 |
DVDD33 |
P |
Digital non-RGMII I/O Power. 3.3V |
|
28 |
DVDD_RG |
P |
Digital RGMII I/O Pad Power |
|
|
21 |
DVDD10 |
P |
Digital Core Power. 1.0V |
|
|
11,40 |
AVDD33 |
P |
Analog Power. 3.3V. |
|
|
3,8,38 |
AVDD10 |
P |
Analog Power. 1.0V. |
|
|
41 |
GND |
G |
Ground. |
7 硬件配置说明
|
管脚序号 |
管脚名称 |
管脚类型 |
应用说明 |
|
35 |
CLKOUT |
O |
125M时钟源，如果不使用，必须保持悬空 |
|
14 |
MDIO |
IO/PU |
需加1.5K上拉电阻 |
|
22 |
PHYAD0 |
O/LI/PD |
PHY[2:0] 物理地址设置 |
|
27 |
PHYAD1 |
O/LI/PD |
|
|
26 |
PHYAD2 |
O/LI/PD |
|
|
24 |
TXDLY |
O/LI/PD |
加上拉，增加2ns TX时钟延时 |
|
25 |
RXDLY |
O/LI/PD |
加上拉，增加2ns RX时钟延时 |
|
32 |
CFG_EXT |
O/LI/PD |
上拉：IO PAD选择外部电源 下拉：IO PAD选择内部LDO电源 |
