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EPM-4 Reference Manual Introduction – 1
Introduction
Description
The EPM-4 (Lynx) is a 486-based processor board in a compact PC/104-Plus format. It is
specifically designed for OEM control projects requiring compact size, high reliability, and long
product lifespan / availability. Its features include:
• AMD ÉlanSC520 microcontroller
• 133 MHz
• 64 MB system RAM
• 10/100 dual-speed Ethernet
• Battery Backed SRAM Option
• Real time clock
• PC/104, PC/104-Plus expansion
interface
• IDE controller
• Two general purpose timer inputs
• Watchdog timer
• Reconfigurable BIOS defaults
• Console redirected to COM port if no
VGA
• Keyboard, mouse, AT motherboard
peripherals
• CompactFlash Socket
• Four COM ports
• Two RS-232
• Two RS-422/485
• Parallel Port/Floppy Interface
• Vcc sensing reset circuit
• Flash BIOS with OEM enhancements
• Ethernet Remote boot capability
3
rd
party boot code not included
• Single supply (+5V) operation
• Customizing available
• Batteryless operation (possible)
• Extended temperature options (100MHz)
• Transient Voltage Suppressor Devices
• RoHS-compliant version available
The EPM-4 is a complete computer system in one board. It may be used alone or with expansion
modules. It features a PC/104-Plus expansion interface for fast PCI-based interface to a wide
variety of PC/104 and PC/104-Plus stacking modules. This card is designed to be used primarily
as an Ethernet node processor card.
It is fully compatible with popular operating systems including Windows 95/98/NT/NTE/, CE,
QNX, Linux, RT-Linux, and other Real Time Operating Systems (see the VersaLogic OS
Compatibility Chart).
On-board I/O includes 10/100 Mbit Ethernet, IDE, four COM ports, floppy and two general-
purpose timer inputs.
This exceptional processor card was designed from the ground up for OEM applications with
longevity and reliability as the main focus. It is fully supported by the VersaLogic design team.
Both hardware and software (BIOS) customization are available in quantities as low as 25 pieces.
Each board is subjected to 100% functional testing and is backed by a limited two-year warranty.
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