MX98741 Datasheet | Macronix

FEATURES - Eight 100 BASE-TX/FX ports; each port individually configurable to TX or FX - Direct interface with analog clock generation/recovery chips - Three Media Independent Interface (MII) - Expandable to increase number of repeater ports - Low latency design simplified high port number Class II repeater implementation - Management features accessible through MII or serial ports - All ports can be separately isolated or partitioned in reponse to fault conditions - Conforms to IEEE 802.3u Repeater Unit Specification - LED display for TX/FX port activities and collisions - 208-pin, CMOS device in PQFP package 2.0 GENERAL DESCRIPTION The MX98741 (100BASE-TX Repeater Controller, XRC) is a 208-pin PQFP device that interfaces directly with offshell clock generation/recovery chips. Eight ports can be configured as 100 BASE-TX or FX ports individually. Three additional ports have Media Independent Interfaces (MII) which allow easy connection of management and bridge devices. The expansion port allows multiple XRCs to be linked together to form a repeater of high port counts. LEDs are provided for visual monitoring of TX/FX port activities and collisions. The XRC's design inserts minimum delay between the TX/FX ports and the expansion port. A master-slave type arbitration is also implemented to shorten the munciation time among multiple XRCs. As a result, design for Class II stackable hub is greatly simplified. Control Functions and management status are implemented through internal registers. These registers are accessed via either standard MII management interface (MDC, MDIO) or several serial ports. These serial ports are accessed easily by hardware for debugging and configuration purposes. A dedicated management chip can also utilize these serial ports to access the XRC. P/N:PM0342 REV. 1.4, NOV. 07, 1998 INDEX .. 3.0 PIN CONFIGURATION VCC RSCLK3 SIGDET3 RDAT30 RDAT31 RDAT32 RDAT33 RDAT34 GND GND TDAT30 TDAT31 TDAT32 TDAT33 TDAT34 GND GND RSCLK4...