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KS8842-32MQL PDF预览

KS8842-32MQL

更新时间： 2024-11-13 21:55:31
品牌 Logo 应用领域
麦瑞 - MICREL PC以太网
页数 文件大小 规格书
1页 68K
描述
2-Port Ethernet Switch with Non-PCI Interface

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中文翻译

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KS8842-32MQL 数据手册

  
         
         
           
           
            
            
              
              
                
                
                   
                   
                     
                     
                      
                      
                        
                         
                          
                           
                            
                            
                              
                              
KS8842-16MQL  
KS8842-32MQL  
Product Brief  
www.micrel.com  
2-Port Ethernet Switch  
with Non-PCI Interface  
Description  
Benefits  
The KS8842M is the industry’s first fully managed 2-port  
switch with a non-PCI CPU interface. The KS8842 is a  
proven, 4th generation, integrated Layer 2 switch that is  
compliant to the IEEE 802.3u standard.  
Offers all of the features of an integrated Layer 2  
managed switch plus:  
• Fully compliant to the IEEE 802.3u standard  
• Repeater mode capabilities to allow for ‘cut-thru’ in  
latency critical Industrial Ethernet or Embedded  
Ethernet applications  
• MAC filtering function to filter unicast packets  
• Dynamic buffer memory scheme  
The KS8842M can also be configured as a low-latency  
repeater to allow for ‘cut thru’ in latency critical Embedded  
or Industrial Ethernet applications. For industrial automa-  
tion applications in the repeater mode, the KS8842M runs  
in half-duplex mode regardless of the application.  
– Essential for applications such as Video over IP  
where image jitter is unacceptable  
TheKS8842Moffersanextensivefeaturesetthatincludes  
tag/port-based VLAN, QoS priority management, MAC  
filtering function, MIB counters, and CPU control/data  
interfaces to effectively address both current and emerg-  
ing Fast Ethernet applications.  
• 2-Port switch with flexible 8/16/32 bit generic host  
processor interface  
TM  
• Micrel LinkMD cable diagnostic capabilities to  
determine cable length, diagnose faulty cables, and  
determine distance to fault  
The KS8842 contains two 10/100 transceivers with pat-  
ented mixed-signal low-power technology, two media ac-  
cess control (MAC) units and a direct memory access  
(DMA) channel, a high-speed non-blocking switch fabric,  
a dedicated 1K entry forwarding table, and an on-chip  
frame buffer memory.  
• HP Auto MDI-X crossover with disable and enable  
option  
o
o
• Industrial Temperature support: –40 C to +85 C  
available from Q4  
• Four priority queues to handle voice, video, data,  
and control packets  
Block Diagram  
Applications  
• Industrial applications for daisy chaining  
1K Look-Up  
Engine  
multiple devices  
HP Auto  
MDI/MDI-X  
10/100  
T/TX  
PHY 1  
10/100  
MAC 1  
• Industrial control in latency critical  
applications  
• Port redundancy and port monitoring  
• Security cameras  
Queue  
Management  
HP Auto  
MDI/MDI-X  
10/100  
T/TX  
PHY 2  
10/100  
MAC 2  
• VoIP phone and ATA adaptors  
Buffer  
Management  
DMA  
Channel  
Non-PCI  
CPU  
Bus Interface Unit  
Embedded  
Processor Interface  
Frame  
Buffers  
8/16/32 Bit  
Generic Host Interface  
MIB  
Counters  
Control  
Registers  
EEPROM  
Interface  
EEPROM I/F  
P1 LED[3:0]  
P2 LED[3:0]  
LED  
Drivers  
Note: For an MII/RMII, I2C or SPI interface, use the KS8883ML.  
LinkMD is a trademark of Micrel, Inc.  
Micrel Semiconductor TEL: 1.408.944.0800 FAX: 1.408.474.1000 HTTP:// www.micrel.com  
1

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