adm6996f Infineon Technologies Corporation, adm6996f Datasheet - Page 40

• Manufacturer Part Number: adm6996f
• Description: 6 Port 10/100 Mb/s Single Chip Ethernet Switch Controller
• Manufacturer: Infineon Technologies Corporation

ADM6996F
Infineon-ADMtek Co Ltd
Below is some old architecture for a Router. The disadvantages of this are:
1. WAN ports only support 10M Half-Duplex and non-MDIX function.
2. Need extra 10M NIC i.e. cost.
3. ISA bus will become the bottleneck of the whole system.
Below is the new architecture using the ADM6996F serial chip VLAN function. The
advantages of below are:
1. WAN Port can upgrade to 100/10 Full/Half , Auto MDIX.
2. No need for an extra NIC therefore much more economical.
3. High bandwidth of port 5 MII up to 200M speed.
In this application, the CPU’s MDC/MDIO interface is used to access all PHY and switch
registers in ADM6996F. Port 4 is used as the WAN port and Port 5 is used to connect the
Port0
Port4 MAC MII Port
4 100/10 LAN Port
Port0
4 100/10 LAN Port
Port5 MAC MII Port
VLAN & WAN Function
Port1
CPU with
one MII
Port1
MII
MII
Port2
CPU with
two MII
Port2
Port3
Port3
ISA
Port4
100/10
WAN Port
MII
10M Half Non
MDIX WAN Port
10M Half
NIC
Register Description
4-3