MX98745

The MX98745, Second generation 100 Mb/s TX/FX Hub Controller (XRC II), is designed specifically to meet the needs of today's high speed Fast Ethernet networking systems. The MX98745 is fully IEEE 802.3u D5 clause 27 repeater compatible.

Difference from MX98741, which provides 8 dedicated TX/FX ports and 3 MII ports, MX98745 support 7 dedicated TX/FX ports and one programmble TX/FX/MII port. Whenever MII port is programmed, MX98745 also supports the flexibility to make user can easily select PCS or MAC type MII for system application. With this programmable MII interface, user can easily connect MX98745 to MX98742 (Bridge), or T4 transceiver. Or user can use this programmable MII interface to connect to either MAC or PCS type data transceiver.

All contents of internal registers are loaded from EEPROM in MX98745. If system application prefers default setting instead of using contents from EEPROM, EEPROM operation can be disabled by setting EECONF to low. This feature faciliates system modulization application.

8 scale of utilization LED is also provided by MX98745. They are 1%, 3%, 5%, 10%, 20%, 40%, 60% and 80+%. The defination for utiliztion is Mbs Received/100 Mb within one second sampling period. Meanwhile, RX/LINK, Partition, Isolation and Collision status are also provided through LED display.

A great improvement in MX98745 (compared to MX98741) is that it also provides "synchronous expansion port data transfer mode" to make stackable design more easier.