INDEX
ADVANCED INFORMATION
MX98747
8-Port Dual-Speed Repeater Controller
1. Features
• Fully integrate eight 10/100Mbps repeater ports
• Support independent 10Mbps and 100Mbps Ethernet
operation segments
• Automatically connect each port to specific segment,
namely 10M or 100M by its data flow rate without user
intervention
• Two expansion bus in backplane, one for 10Mbps
operation and one for 100Mbps operation are used to
cascade other controllers or stack hub devices
• Integrate LED drivers for at-a-glance operation status
monitoring
• 208-pin PQFP
2. Description
MX98747 is an 8-port dual-speed repeater controller to
provide system vendors a cost-effective chip solution
on work-group segment-switched, stack hub devices.
Works with (quad) auto-detect PHY components,
MX98747 builds separate 10Mbps repeater state ma-
chine and 100Mbps repeater state machine inside to
supports either conventional Ethernet or Fast Ethernet
operation on each MII port. Depending on data rate,
controller automatically hooks each port to the specific
segment such that the 10M ports operate in one do-
main and 100M ports in another domain, they do not
interfere mutually. Controller provides two expansion
ports (or inter-repeater buses) for stack hub applica-
tion, one for 10Mbps cascading and one for 100Mbps
cascading. Up to 31 controllers can be chained together
in a stack hub system. Cooperates with MX98748 that
build in an internal switch will perfectly connect 10M and
100M segments in a repeater set.
LED drivers are integrated per hub port for operation
status monitoring. System vendors could implement LED
matrix display on front panel for at-a-glance monitoring.
Individual LED could indicate "Speed" (10Mbps or
100Mbps rate), "Collision", "Link", "Partition", and "Utili-
zation".
P/N:PM0585
REV. 0.0, OCT. 20, 1998
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