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LAN9211_0711 参数 Datasheet PDF下载

LAN9211_0711图片预览
型号: LAN9211_0711
PDF下载: 下载PDF文件 查看货源
内容描述: 高性能小尺寸单芯片以太网控制器与HP Auto-MDIX的 [High-Performance 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: 146 页 / 1764 K
品牌: SMSC [ SMSC CORPORATION ]
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High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX  
Datasheet  
Table 4.2 CRS Behavior  
CRS BEHAVIOR  
MODE  
SPEED  
DUPLEX  
ACTIVITY  
(Note 4.1)  
Manual  
Manual  
10 Mbps  
10 Mbps  
10 Mbps  
10 Mbps  
100 Mbps  
100 Mbps  
100 Mbps  
100 Mbps  
10 Mbps  
10 Mbps  
10 Mbps  
10 Mbps  
100 Mbps  
100 Mbps  
100 Mbps  
100 Mbps  
Half-Duplex  
Half-Duplex  
Full-Duplex  
Full-Duplex  
Half-Duplex  
Half-Duplex  
Full-Duplex  
Full-Duplex  
Half-Duplex  
Half-Duplex  
Full-Duplex  
Full-Duplex  
Half-Duplex  
Half-Duplex  
Full-Duplex  
Full-Duplex  
Transmitting  
Receiving  
Active  
Active  
Low  
Manual  
Transmitting  
Receiving  
Manual  
Active  
Active  
Active  
Low  
Manual  
Transmitting  
Receiving  
Manual  
Manual  
Transmitting  
Receiving  
Manual  
Active  
Active  
Active  
Low  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Auto-Negotiation  
Transmitting  
Receiving  
Transmitting  
Receiving  
Active  
Active  
Active  
Low  
Transmitting  
Receiving  
Transmitting  
Receiving  
Active  
Note 4.1 The LAN9211 10/100 PHY internal CRS signal operates in two modes: Active and Low.  
When in Active mode, the internal CRS will transition high and low upon line activity, where  
a high value indicates a carrier has been detected. In Low mode, the internal CRS stays  
low and does not indicate carrier detection. The internal CRS signal and No Carrier (bit 10  
of the TX Status word) cannot be used as a verification method of transmitted packets  
when transmitting in 10/100 Mbps full-duplex mode.  
4.8  
HP Auto-MDIX  
HP Auto-MDIX facilitates the use of CAT-3 (10 Base-T) or CAT-5 (100 Base-T) media UTP interconnect  
cable without consideration of interface wiring scheme. If a user plugs in either a direct connect LAN  
cable, or a cross-over patch cable, as shown in Figure 4.3, the SMSC LAN9211 Auto-MDIX PHY is  
capable of configuring the TPO and TPI twisted pair pins for correct transceiver operation.  
The internal logic of the device detects the TX and RX pins of the connecting device. Since the RX  
and TX line pairs are interchangeable, special PCB design considerations are needed to accommodate  
the symmetrical magnetics and termination of an Auto-MDIX design.  
The Auto-MDIX function can be disabled through an internal register 27.15, or the external control pins  
AMDIX_EN. When disabled the TX and RX pins can be configured with the Channel Select  
(CH_SELECT) pin as desired.  
SMSC LAN9211  
75  
Revision 1.93 (11-27-07)  
DATASHEET  
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