VersaLogic EPM-4 User manual

Reference
Manual
DOC. REV. 3/16/2009
EPM-4
(Lynx)
AMD ÉlanSC520 processor
module with 10/100 Ethernet,
and PC/104-Plus interface.

EPM-4
AMD ÉlanSC520 processor
module with 10/100 Ethernet,
and PC/104-Plus interface
MEPM4

Product Release Notes
This page includes recent changes or improvements that have been made to this
product. These changes may affect its operation or physical installation in your
application. Please read the following information.
Rev 5 Release
•EPM-4h model release – RoHS extended temperature version.
Rev 4 Release
•PC/104 (ISA) connector keyed to better comply with standard. PC/104 connector soldered instead of
press-fit.
•Physically smaller fuse at F1 with same protection value.
•3.0V battery.
Rev 3 Release
•EPM-4g model release – Initial RoHS version.
Rev 2 Release
•Initial public release.
Support Page
The EPM-4 Support Page, at http://www.VersaLogic.com/private/lynxsupport.asp contains additional
information and resources for this product including:
•Reference Manual (PDF format)
•Operating system information and software drivers
•Data sheets and manufacturers’ links for chips used in this product
•BIOS information and upgrades
•Utility routines and benchmark software
Note: This is a private page for EPM-4 users only. It cannot be reached through our web site. You must
enter this address directly to find the support page.

Model EPM-4
AMD Élan processor module with 10/100 Ethernet,
and PC/104-Plus interface
REFERENCE MANUAL
VERSALOGIC CORPORATION
WWW.VERSALOGIC.COM
3888 Stewart Road
Eugene, OR 97402
[phone]
Fax [phone]
Contents Copyright ©2009
All Rights Reserved
Notice:
Although every effort has been made to ensure this document is error-free, VersaLogic makes no
representations or warranties with respect to this product and specifically disclaims any implied
warranties of merchantability or fitness for any particular purpose.
VersaLogic reserves the right to revise this product and associated documentation at any time
without obligation to notify anyone of such changes.
PC/104 and the PC/104 logo are trademarks of the PC/104 Consortium.

iii
Table of Contents
Introduction .....................................................................................................................1
Description..........................................................................................................................1
Technical Specifications.....................................................................................................2
EPM-4 Block Diagram .......................................................................................................3
RoHS-Compliant Version...................................................................................................4
About RoHS...........................................................................................................4
RoHS Compliant Cables........................................................................................4
Technical Support...............................................................................................................5
Repair Service........................................................................................................5
Configuration / Operation...............................................................................................7
Overview.............................................................................................................................7
Electrostatic Discharge ..........................................................................................7
Lithium Battery......................................................................................................7
Initial Configuration and Setup...........................................................................................8
Recommended Components ..................................................................................8
CMOS Setup / Boot Procedure...........................................................................................9
Console Redirection..........................................................................................................10
CMOS Setup / IDE Configuration.................................................................................... 11
IDE.......................................................................................................................11
IDE setup .............................................................................................................11
CMOS Setup / Advanced Configuration ..........................................................................12
D0000h 64k page function...................................................................................12
PLD register base I/O ..........................................................................................12
Force Ethernet 10-BaseT .....................................................................................12
PS/2 Mouse (IRQ12) ...........................................................................................13
LPT1 (0378h).......................................................................................................13
Parallel Port Mode...............................................................................................13
CPU Speed...........................................................................................................13
Cache Mode.........................................................................................................13
Write Buffer.........................................................................................................13
GP Bus Timings...................................................................................................13
COM1 (03F8h) RS-232....................................................................................... 14
COM2 (02F8h) RS-232....................................................................................... 14
COM3 (03E8h) RS-422/485................................................................................ 14
COM4 (02E8h) RS-422/485................................................................................ 14
GP Timer 0, GP Timer 1, Watchdog Timer.........................................................14
PCI Interrupt A, B, C, and D ...............................................................................14
Using Custom CMOS Defaults.........................................................................................15
Reference.......................................................................................................................17
Physical Dimensions.........................................................................................................17
Height Dimensions ..............................................................................................18
Hardware Assembly.............................................................................................19
Stack Arrangement ..............................................................................................19
External Connectors..........................................................................................................20

Table of Contents
iv
Connector Location Diagram............................................................................... 20
Connector Functions and Interface Cables..........................................................21
Jumper Block Locations ...................................................................................................22
Jumper Summary.................................................................................................23
Power Supply....................................................................................................................24
Power Connectors................................................................................................ 24
Power Requirements............................................................................................25
Lithium Battery....................................................................................................25
CPU...................................................................................................................................26
System RAM.....................................................................................................................26
Memory................................................................................................................26
CMOS RAM.....................................................................................................................26
Clearing CMOS RAM.........................................................................................26
Default CMOS RAM Setup Values.....................................................................26
Real Time Clock...............................................................................................................26
Setting the Clock..................................................................................................26
Battery Backed Static RAM..............................................................................................27
Serial Ports........................................................................................................................27
COM Port Configuration.....................................................................................27
COM3 and COM4 RS-485 Mode Line Driver Control.......................................27
IDE Hard Drive / CompactFlash / CD-ROM Interface ....................................................28
Utility Connector (J7).......................................................................................................29
Keyboard/Mouse Interface .................................................................................. 30
Programmable LED............................................................................................. 30
External Speaker..................................................................................................30
Push-Button Reset................................................................................................30
General-Purpose Timer Inputs.............................................................................30
Parallel / Floppy Port .......................................................................................................31
Parallel Port Operation.........................................................................................31
Floppy Port Operation .........................................................................................31
Parallel / Floppy Port Pinout................................................................................31
Ethernet Interface..............................................................................................................32
BIOS Configuration............................................................................................. 32
Status LED...........................................................................................................32
Ethernet Connector..............................................................................................32
Watchdog Timer ...............................................................................................................33
Expansion Bus ..................................................................................................................34
PC/104-Plus (PCI Bus)....................................................................................... 34
PC/104 (ISA Bus)................................................................................................34
I/O Configuration.................................................................................................34
Memory and I/O Map .......................................................................................................36
ÉlanSC520 Memory Mapped Configuration Region (MMCR) Registers...........36
Memory Map ....................................................................................................... 36
I/O Map................................................................................................................37
Interrupt Configuration.....................................................................................................38
Special Control Register................................................................................................... 39
Revision Indicator Register...............................................................................................40
Map and Paging Control Register.....................................................................................41
Appendix A — CBL/CBR-5009 .....................................................................................43

Table of Contents
v
Appendix B — References ...........................................................................................45

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
3rd 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.
1

Technical Specifications
Introduction – 2 EPM-4 Reference Manual
Technical Specifications
Specifications are typical at 25°C with 5.0V supply unless otherwise noted.
Board Size:
3.55" x 3.775" (PC/104 standard).
Storage Temperature:
–40° C to 85° C
Operating Temperature:
EPM-4c, g 0° C to +60° C (100 FPM airflow)
EPM-4e, h -40° C to +85° C (free air, extended temperature versions)
Power Requirements: (with keyboard, mouse, and hard drive running DOS)
EPM-4c, g 133 MHz +5V ±5% @ 0.94A
EPM-4e, h 100 MHz +5V ±5% @ 0.84A, extended temperature versions
+3.3V or ±12V may be required by some expansion modules
System Reset:
Vcc sensing, resets below 4.70V typ.
Watchdog timeout
BBSRAM Interface:
2 MB option mapped into high memory
IDE Interface:
Industry standard 2mm 44-pin non-latching style, CompactFlash socket.
LPT/Floppy Interface:
Supports one floppy drive or parallel port.
Ethernet Interface:
Autodetect 10BaseT/100BaseTX based on Intel 82551ER. 12K transmit/receive buffer.
COM1 and COM2 Interface:
RS-232, 16C550 compatible, 115K baud max.
COM3 and COM4 Interface:
RS-422/485, 16C550 compatible, 460K baud max.
Connectors:
Utility: 2mm 50-pin shrouded
IDE: 2mm 44-pin
Floppy/LPT: 2mm 20-pin shrouded
Ethernet: RJ45
Power: 0.1” 10-pin
CompactFlash Type II socket
BIOS: General Software embedded BIOS with OEM enhancements
Field upgradeable with Flash BIOS Upgrade Utility
Bus Speed:
PCI, PC/104-Plus: 33 MHz, Revision 2.0
PC/104: 8 MHz, Revision 2.5
Compatibility:
PC/104 – Fully functional with most PC/104 devices. See the Expansion Bus section for details.
Embedded-PCI (PC/104-Plus) – Full compliance, 3.3V or 5V modules
RoHS: EPM-4g, h – Full compliance
Weight: EPM-4c, g – 0.117 kg (0.275 lbs)
EPM-4e, h – 0.116 kg (0.255 lbs)
Specifications are subject to change without notice.

EPM-4 Block Diagram
EPM-4 Reference Manual Introduction – 3
EPM-4 Block Diagram

RoHS-Compliant Version
Introduction – 4 EPM-4 Reference Manual
RoHS-Compliant Version
The EPM-4g and EPM-4h are RoHS-compliant. These models are functionally identical to the
non-RoHS version of the boards.
ABOUT ROHS
In 2003, the European Union issued Directive 2002/95/EC regarding the Restriction of the use of
certain Hazardous Substances (RoHS) in electrical and electronic equipment.
The RoHS directive requires producers of electrical and electronic equipment to reduce to
acceptable levels the presence of six environmentally sensitive substances: lead, mercury,
cadmium, hexavalent chromium, and the presence of polybrominated biphenyls (PBB) and
polybrominated diphenyl ethers (PBDE) flame retardants, in certain electrical and electronic
products sold in the European Union (EU) beginning July 1, 2006.
VersaLogic Corporation is committed to supporting customers with high-quality products and
services meeting the European Union’s RoHS directive.
ROHS COMPLIANT CABLES
Adapter cables for the EPM-4 are available in RoHS compliant and RoHS noncompliant versions.
Compliance or noncompliance is indicated by the part number prefix. “CBR” indicates RoHS
compliance. “CBL” indicates RoHS noncompliance. For applications that require RoHS
compliance, use only the RoHS compliant (“CBR” version) cables. Availability of RoHS
noncompliant cables may be limited.

Technical Support
EPM-4 Reference Manual Introduction – 5
Technical Support
If you have problems that this manual can’t help you solve, first visit the EPM-4 Product Support
web page below. If you have further questions, contact VersaLogic for technical support at
[phone]. You can also reach our technical support engineers via e-mail at
[email protected].
REPAIR SERVICE
If your product requires service, you must obtain a Returned Material Authorization (RMA)
number by calling [phone].
Please provide the following information:
•Your name, the name of your company, and your phone number
•The name of a technician or engineer who we can contact if we have questions
•Quantity of items being returned
•The model and serial number (bar code) of each item.
•A description of the problem
•Steps you have taken to resolve or repeat the problem
•The return shipping address
Warranty Repair All parts and labor charges are covered, including return shipping
charges for UPS Ground delivery to United States addresses.
Non-warranty Repair All non-warranty repairs are subject to diagnosis and labor charges,
parts charges, and return shipping fees. We will need to know what
shipping method you prefer for return back to your facility, and we
will need to secure a purchase order number for invoicing the repair.
Note: Please mark the RMA number clearly on the outside of the box before
returning. Failure to do so can delay the processing of your return.
EPM-4 Support Website
http://www.VersaLogic.com/private/lynxsupport.asp

EPM-4 Reference Manual Configuration / Operation – 7
Configuration / Operation
Overview
ELECTROSTATIC DISCHARGE
Warning! Electrostatic discharge (ESD) can damage boards, disk drives, and other
components. The circuit board must only be handled at an ESD workstation. If an
approved station is not available, some measure of protection can be provided by
wearing a grounded anti-static wrist strap. Keep all plastic away from the board,
and do not slide the board over any surface.
After removing the board from its protective wrapper, place the board on a
grounded, static-free surface, component side up. Use an anti-static foam pad if
available.
The board should also be protected during shipment or storage by keeping inside a
closed metallic anti-static envelope.
Note: The exterior coating on some metallic anti-static bags is sufficiently conductive to
cause excessive battery drain if the bag comes in contact with the bottom side of
the EPM-4.
LITHIUM BATTERY
Warning! To prevent shorting, premature failure, or damage to the lithium battery, do not
place the board on a conductive surface such as metal, black conductive foam, or
the outside surface of a metalized ESD protective pouch. The lithium battery may
explode if mistreated. Do not recharge, disassemble, or dispose of in fire. Dispose
of used batteries promptly.
2

Initial Configuration and Setup
Configuration / Operation – 8 EPM-4 Reference Manual
Initial Configuration and Setup
The following list describes the components recommended for setting up a typical development
system.
RECOMMENDED COMPONENTS
•EPM-4 Board and cable kit
•ATX Power Supply
•EPM-VID-3 for video support
•Keyboard with PS/2 connector, mouse
•Ethernet Network
•IDE Hard Drive
•Floppy Drive

CMOS Setup / Boot Procedure
EPM-4 Reference Manual Configuration / Operation – 9
CMOS Setup / Boot Procedure
•Turn power on.
•Press the DEL key the instant that video is displayed (during the memory test).
•Verify default CMOS Setup information as shown below.
•Insert bootable floppy disk into floppy drive.
•Reset computer using push button reset.
•See VersaLogic KnowledgeBase article VT1476 – EPM-4 CMOS Setup Reference for
more information about these parameters.
Basic CMOS Configuration
+------------------------------------------------------------------------------+
| System Bios Setup - Basic CMOS Configuration |
| (C) 2002 General Software, Inc. All rights reserved |
+---------------------------+--------------------+-----------------------------+
| DRIVE ASSIGNMENT ORDER: | Date:>JAN 1, 1980 | Typematic Delay : 250 ms |
| Drive A: Floppy 0 | Time: 00 : 00 : 00 | Typematic Rate : 30 cps |
| Drive B: (None) | NumLock: Disabled | Seek at Boot : None |
| Drive C: IDE 0/Pri Master +--------------------+ Show "Hit Del" : Enabled |
| Drive D: (None) | BOOT ORDER: | Config Box : Enabled |
| Drive E: (None) | Boot 1st: Drive A: | F1 Error Wait : Enabled |
| Drive F: (None) | Boot 2nd: Drive C: | Parity Checking : (Unused) |
| Drive G: (None) | Boot 3rd: (None) | Memory Test Tick : Enabled |
| Drive H: (None) | Boot 4th: (None) | Debug Breakpoints: (Unused) |
| Drive I: (None) | Boot 5th: (None) | Debugger Hex Case: Upper |
| Drive J: (None) | Boot 6th: (None) | Memory Test : StdLo FastHi |
| Drive K: (None) +--------------------+-----------------+-----------+
| (Loader): (Unused) | ATA DRV ASSIGNMENT: Sect Hds Cyls | Memory |
+---------------------------+ Ide 0: 3 = AUTOCONFIG, LBA | Base: |
| FLOPPY DRIVE TYPES: | Ide 1: 3 = AUTOCONFIG, LBA | 633KB |
| Floppy 0: 1.44 MB, 3.5" | Ide 2: Not installed | Ext: |
| Floppy 1: Not installed | Ide 3: Not installed | 63MB |
+---------------------------+--------------------------------------+-----------+
Custom Configuration
+------------------------------------------------------------------------------+
| System BIOS Setup - Custom Configuration |
| (C) 2002 General Software, Inc. All rights reserved |
+---------------------------------------+--------------------------------------+
| D0000h 64k page function : ISA bus | COM1 (3F8h) RS-232 : IRQ4 |
| PLD register base I/O : 0E0h | COM2 (2F8h) RS-232 : IRQ3 |
| Force Ethernet 10-BaseT : Disabled | COM3 (3E8h) RS-422/485 : Disabled |
| PS/2 Mouse (IRQ12) : Enabled | COM4 (2E8h) RS-422/485 : Disabled |
| LPT1 (378h) : Disabled | GP Timer 0 : Disabled |
| Parallel Port Mode : FDD | GP Timer 1 : Disabled |
| CPU Speed : 133 MHz | Watchdog Timer : Disabled |
| Cache Mode : Wr-back | PCI Int A : IRQ11 |
| Write Buffer : Enabled | PCI Int B : IRQ11 |
| GP Bus Timings : Normal | PCI Int C (Ethernet) : IRQ11 |
| Console Redirection : Auto | PCI Int D : IRQ11 |
+---------------------------------------+--------------------------------------+
Note: Due to changes and improvements in the system BIOS, the information on your
monitor may differ from that shown above.

Console Redirection
Configuration / Operation – 10 EPM-4 Reference Manual
Console Redirection
If there is no video device detected during boot up, BIOS keyboard and screen I/O can be
redirected to the COM2 RS-232 serial port. CMOS configuration can be modified over this
redirected console. ANSI or VT102 terminal emulation is recommended.
When console redirection is enabled, press CTRL-C on the terminal emulator to enter CMOS
Setup; the BIOS ignores DEL from a PS/2 keyboard. This is normal operation of the Lynx.
COM2 is configured for standard serial port communication:
•9600 Baud
•Parity: None
•Flow Control: None
•Data Bits: 8
•Stop Bits: 1
Console redirection remains active when POST completes and the operating system boots. Text-
based operating systems such as DOS and Linux can be controlled over this connection.
To enable console redirection, there must be no video device detected, the console redirection
option in Custom Configuration must be set to Auto, and there must be a terminal (such as
Windows HyperTerm) detected at COM2.

CMOS Setup / IDE Configuration
EPM-4 Reference Manual Configuration / Operation – 11
CMOS Setup / IDE Configuration
IDE
The Lynx has a single IDE channel to connect up to two hard disks, CompactFlash modules
or CD-ROM drives. This basic IDE interface operates using PIO mode 0, resides on the ISA
bus, and does not support the drive address register at I/O address 3F7h. It has been tested
successfully on a wide variety of operating systems.
IDE SETUP
IDE devices include hard disk drives, CD-ROM drives, and some CompactFlash modules.
There are 3 fields in the Basic CMOS Configuration screen that are relevant to IDE setup:
IDE Drive Geometry, Drive Assignment Order, and Boot Order.
IDE Drive Geometry
Most desktop PCs have two IDE channels, each capable of supporting two IDE devices
in a slave/master configuration or a single IDE device in a single (or master only)
configuration.
In the IDE Drive Geometry list:
IDE 0 corresponds to primary channel, master/single drive.
IDE 1 corresponds to primary channel, slave drive.
IDE 2 corresponds to secondary channel, master/single drive.
IDE 3 corresponds to secondary channel, slave drive.
The Lynx uses the first IDE channel only. IDE 2 and IDE 3 are unused
All modern IDE devices use LBA mode. When setting up an IDE device, leave the drive
geometry set to LBA mode unless your hard drive requires a different mode.
CD-ROM drives that will be used as boot devices should be set accordingly in the Drive
Geometry list.
Drive Assignment Order
After a hard drive has been declared in the IDE Drive Geometry field, it must be
assigned a DOS drive letter, even if you are not using the DOS operating system.
Normally, "Drive C:" will be assigned to the IDE device that you wish to boot from.
Do not attempt to assign a drive letter to a CD-ROM drive. The drivers required to use
these devices will automatically assign a drive letter to the device when loaded.
Boot Order
This field allows you to specify the order in which the BIOS looks for boot devices.

CMOS Setup / Advanced Configuration
Configuration / Operation – 12 EPM-4 Reference Manual
Usually, the drive you specify here corresponds to the declaration in the Drive
Assignment Order field.
A CD-ROM drive can be inserted into the boot order by selecting “CDROM” at the
desired boot order position.
CMOS Setup / Advanced Configuration
D0000H 64K PAGE FUNCTION
Default: ISA bus
ISA bus
Memory accesses to the D0000h page will be sent to the ISA bus for use by PC/104
expansion modules. This setting is required when flashing the BIOS with the FBU utility.
BIOS Ext
The D0000h page is mapped to sector 1 in the flash chip, which may contain 3rd party
Ethernet boot code or any other BIOS extension (not included). If there is a such an
extension present, it will be called by the BIOS. The BIOS extension can be programmed
into the flash chip with the FBU utility. For remote booting via Ethernet, the
recommended boot ROM is Managed PC Boot Agent from Argon Technology
Corporation.
RAM
System RAM is exposed in the D0000h page.
PLD REGISTER BASE I/O
Default: 0E0h
Specifies the location of the PLD register in I/O space. It can be moved to 1E0h in case of an
address conflict within add-in module.
FORCE ETHERNET 10-BASET
Default: Disabled
When enabled, this will disable the Ethernet media data rate auto-negotiation and force it to 10-
BaseT mode.
Note: Some drivers will put the Ethernet back into auto-negotiation mode.