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LAN9210 参数 Datasheet PDF下载

LAN9210图片预览
型号: LAN9210
PDF下载: 下载PDF文件 查看货源
内容描述: 外形小巧单芯片以太网控制器与HP Auto-MDIX的 [Small Form Factor Single- Chip Ethernet Controller with HP Auto-MDIX]
分类和应用: 控制器以太网
文件页数/大小: 458 页 / 4618 K
品牌: SMSC [ SMSC CORPORATION ]
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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface  
Datasheet  
7.2.1  
100BASE-TX Transmit  
The 100BASE-TX transmit data path is shown in Figure 7.2. Shaded blocks are those which are  
internal to the PHY. Each major block is explained in the following sections.  
100M  
PLL  
Internal  
MII Transmit Clock  
Port x  
MAC  
MII MAC  
Interface  
4B/5B  
Encoder  
Scrambler  
and PISO  
Internal  
MII 25 MHz by 4 bits  
25MHz  
by 4 bits  
25MHz by  
5 bits  
125 Mbps Serial  
NRZI  
Converter  
MLT-3  
Converter  
100M  
TX Driver  
NRZI  
MLT-3  
MLT-3  
Magnetics  
MLT-3  
MLT-3  
RJ45  
CAT-5  
Figure 7.2 100BASE-TX Transmit Data Path  
MII MAC Interface  
7.2.1.1  
7.2.1.2  
For a transmission, the switch fabric MAC drives the transmit data to the PHYs MII MAC Interface.  
The MII MAC Interface is described in detail in Section 7.2.7, "MII MAC Interface".  
Note: The PHY is connected to the switch fabric MAC via standard MII signals. Refer to the IEEE  
802.3 specification for additional details.  
4B/5B Encoder  
The transmit data passes from the MII block to the 4B/5B Encoder. This block encodes the data from  
4-bit nibbles to 5-bit symbols (known as “code-groups”) according to Table 7.2. Each 4-bit data-nibble  
is mapped to 16 of the 32 possible code-groups. The remaining 16 code-groups are either used for  
control information or are not valid.  
The first 16 code-groups are referred to by the hexadecimal values of their corresponding data nibbles,  
0 through F. The remaining code-groups are given letter designations with slashes on either side. For  
example, an IDLE code-group is /I/, a transmit error code-group is /H/, etc.  
Revision 1.2 (04-08-08)  
SMSC LAN9312  
DATA8S4HEET