TME-EPIC-HURLX-R3V5.docx
Rev 3.5
Page 16 of 49
3.4
Micrel KSZ8842 Ethernet Switch
The KSZ8842-PMQL is the industry’s first fully managed 2-port switch with a 32 bit/33MHz PCI processor
interface. It is a proven, 4th generation, integrated Layer 2 switch that is compliant with the IEEE 802.3u standard.
The KSZ8842-PMQL can be configured as a switch or as a low-latency (<310 nanoseconds) repeater in latency-
critical, embedded or industrial Ethernet applications. For industrial automation applications, the KSZ8842-PMQL
can run in half duplex mode regardless of the application.
The KSZ8842-PMQL offers an extensive feature set that includes tag/port-based VLAN, quality of service (QoS)
priority management, management information base (MIB) counters, and CPU control/data interfaces to effectively
address Fast Ethernet applications.
The KSZ8842-PMQL contains two 10/100 transceivers with patented, mixed-signal, low-power technology three
media access control (MAC) units, a direct memory access (DMA) channel, a high-speed, non-blocking, switch
fabric, a dedicated 1K entry forwarding table, and an on-chip frame buffer memory.
Ethernet-RJ 45-Connectors
Connectors
J14-1, J15-1
Connector type:
RJ45 Jack
Matching connector:
Pin
8P8C
(RJ45) plug
Signal
1
TX+
2
TX-
3
RX+
4
PE
5
PE
6
RX-
7
PE
8
PE
USB-Connectors
Connectors
J14-2 (0/1) J15-2 (2/3)
Connector type:
USB Jack
Matching connector:
USB1/3 (top), 0/2 (bottom)
USB type A plug
Pin
Signal
1
USB_VCC
2
USB-
3
USB+
4
GND
3.5
On Board Power Supply
The on board power supply generates all necessary voltages from the Mini ATX compliant power supply unit. To
use a standard ATX 1.3 compliant power supply unit, an adapter is delivered with the board.
LED
Signal
Color
A
Link
Green
B
Activity
Orange
