Chapter 1. Overview
The JL5109C is a 9*port Fast Ethernet (FE) switch with MII/RMIl interface. It supports Quality of Service
(QoS) functions with 4-level priority queues that ensure the performance of a number of real-time
network applications.
The JL5109C integrates a 2K-entry address lookup table and a 4-way associative hash algorithm to validate input values, avoid hash collisions, and maintain forwarding performance. The supported maximum length of a data packet is 4096 bytes. With three types of independent storm filters, the
JL5109C can filter packet storms. The JL5109Caso integrates an intelligent switch engine that solves theHead-of-Line(HOL) blocking problems.
The JL5109C supports 16VLAN groups that can be configured as port-basedVLANs and/or 802.1Q tag.based VLANs.
1.1.Feature List
●Basic Switch Functions
Upto 8x10BASE-T/100BASE-TX Ethernet ports +1MI/RM port
Complies with IEEE 802.3/8023u Auto-Negotiation
Flow control in half-duplex and full-duplex modes
.Non-blocking wire-speed reception and transmission and non-HOL forwarding
L2 switching with 2K-entry L2 MAC table, hash-based 4-way, 16-entry hash collision CAM, and 64-
entry L2 multicast table
*Jumbo frame support, up to 4096 bytes
570K bits packet buffer and supports full mesh test from 64B to 1518B
·MIBs cover TX/RX packet/bytes counter,UC/MC/Flood packet/bytes counter,packet CRCerror
counter, and drop counter
.Quality of Service (QoS)
Supports high.performance QoS function on each port
4-level Priority Queues
Weighted Round Robin service and Strict Priority
.1Q-based,Port-based, DSCP-based priority assignments
Supports Queue Management Operations
·Disables scheduling of packets on a port
·Disables queuing new packets to a port
*Allows a port to be drained without sending out packets
.Allows one port traffic to be sent out to another port
*Allows checking whether a port is empty or not
·VLAN Functions
16-entry VLAN groups
.Flexible 802.1Q port/tag-based VLAN
for
16 VLANs are selected from a "cam-type-matching"
·Diagnostic Functions
Supports hardware loop detection function with LEDs and buzzer to indicate the existence of a loop
.Flexible LED indicators
*Loop status indication
·LEDs blink upon reset for LED diagnostics
Other Functions
Supports Ingress/ Egress port mirror
●Multicast/Broadcast stor control with separate token buckets for flooding, broadcast, and
multicast packets
*Multicast/Broadcast storm control is either packet or byte-based, configurable per egress port
32·entry L2 classification table for advanced application
STP.Supports BPDUand LLDP parsing.Supports port status (forwarding,listening,blocking
assignment by SW).
Physical layer port Polarity Detection and Correction function
*Single 3.3V power input can be transformed by integrating LDO regulator to generate 1.1V from
3.3V via a low-cost extemal Diode
25-MHz crystal or 3.3V OSC input
88-pin QFN package for 9-port FE Switch
1.2.Applications
·SOHO FE Switch
9=Port Switch (10BASE-Tand 100BASE-TX)
●HomePNAVHome Plug bridge
●Set-Top Box/TV
