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VersaLogic EPM-5, Reference Manual

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VersaLogic EPM-5 Reference Manual Download Page 24

Physical Details 

EPM-5 Reference Manual 

18 

EPM-5

 

C

ONNECTOR 

F

UNCTIONS AND 

I

NTERFACE 

C

ABLES

 

Table 1 provides information about the function, mating connectors, and transition cables for 
EPM-5 connectors. Page numbers indicate where a detailed pinout or further information is 
available.  

Note: 

Adapter cables for the EPM-5 are available in RoHS compliant and RoHS 
noncompliant versions (see “RoHS Compliance”). 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. 

Table 1: Connector Functions and Interface Cables 

 
Connector 

 
Function 

 
Mating Connector 

Transition 

Cable 

Cable Description 

Pin 1 Location

1

 

x coord.    y coord. 

Page 

J1 

Video Output 

FCI 89361-712 or 
FCI 89947-712 

CBL-1201 or 
CBR-1201 

1’ 12-pin 2mm latching / 
15-pin HD D-Sub VGA 

-0.191 2.795  32 

J2 PC/104-

Plus

 AMP 

1375799-1 

— 

— 

0.450 

3.139 

15 

J3 PLD 

Reprogram-

ming Port 

— — 

— 

2.795 

3.125 

— 

J4 

Ethernet  

RJ-45 

— — 

3.000 

2.545 

36 

J5 

LPT port 

FCI 89947-720 

CBL-2003 or 
CBR-2003 

1’ 20-pin 2mm latching 
IDC / 25-pin F D-Sub 

-0.191 1.825  31 

J6 

CompactFlash 

Type I or Type II 
CompactFlash 

— — 

2.996 

0.743 

— 

J7 

IDE Hard Drive 
Channel 1 

FCI 89947-144 

CBL-4406 or 
CBR-4406

2

 

1’ 44-pin 2mm latching / 
two 44-pin 2mm 

3.153 2.227  27 

J8 

COM ports, USB 
ports,  DB-9, timer 
inputs, push-button 
reset, PC speaker, 
LED  

FCI 89361-350LF 

CBL-5009A or 
CBR-5009A 

50-pin standard I/O cable 
to breakout board 
CBL/CBR-5010 

3.340 2.270  29 

J9 

Main Power Input 

Berg 69176-010 (housing) + 
Berg 47715-000 (pins) 

CBL-1008 or 
CBR-1008 

Interface from standard 
ATX power supply 

0.275 -0.075  22 

J10 PC/104 

AMP 

1375795-2 — — 

0.050 

0.200 

15 

J11 Process 

JTAG 

DBUG 

2mm — 

— 

1.275 

3.515 

— 

J12 

LVDS 

Molex 51146-2000 (housing)
Molex 50641-8041 (pins) 
 

CBL-2010 or 
CBR-2010; 
CBL-2011 or 
CBR-2011 

18-bit TFT FPD using 
20-pin Hirose conn. or 

18-bit TFT FPD using 
20-pin JAE conn. 

-0.050 1.640  33 

J13 

Audio 

FCI 89947-708LF or 
FCI 89361-708LF 

CBL-0803 or 
CBR-0803 

12" latching 8-pin 2mm to 
two 3.5mm stereo audio 

2.769 1.580  37 

 

1. The PCB Origin is the mounting hole to the lower left, as shown in Figures 8. 
2. CBL/CBR-4405 44-pin to 40-pin adapter required to connect to 3.5-inch IDE drives with 40-pin connectors. 

 

Summary of Contents for EPM-5

Page 1: ...Reference Manual DOC REV 3 17 2009 EPM 5 Puma AMD GX Based SBC with Ethernet Video and PC 104 Plus interface ...

Page 2: ...t 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 ...

Page 3: ... O resources R5 07 BIOS revision improves LVDS panel dot clock rate at high resolution and PCI IRQ line routing PLD revision implements GNT REQ synchronization with the PCI clock and IOCHRDY on the ISA bus Rev 4 Release Production release ACPI pushbutton control jumper ISA IRQ5 removed RoHS compliance Rev 3 Release Charlie release USB 2 0 Audio interface ACPI power management standby suspend to RA...

Page 4: ...11 Operating System Installation 12 Physical Details 13 Dimensions and Mounting 13 Side Profile 14 Hardware Assembly 15 Stack Arrangement Example 15 External Connectors 16 EPM 5 Connector Locations Top 16 EPM 5 Connector Locations Bottom 17 EPM 5 Connector Functions and Interface Cables 18 Connector Locations CBL CBR 5010 19 CBL CBR 5010 Connector Functions and Mating Connectors 19 Jumper Blocks 2...

Page 5: ...face 30 Programmable LED 30 IDE LED 30 Internal Speaker 30 Push Button Reset 30 Parallel Port 31 Video Interface 32 Configuration 32 Video BIOS Selection 32 SVGA Output Connector 32 LVDS Flat Panel Display Connector 33 Compatible LVDS Panel Displays 34 Console Redirection 34 Ethernet Interface 36 BIOS Configuration 36 Status LED 36 Ethernet Connector 36 Audio 37 Software Configuration 37 CPU Tempe...

Page 6: ...ontents EPM 5 Reference Manual vi Revision Indicator Register 42 Jumper and Status Register 43 RS 485 422 Transmit Receive Control Register 44 Appendix A References 45 Appendix B Generated Frequencies 46 ...

Page 7: ...ailable Low power fanless version The EPM 5 is a PC 104 Plus compliant single board computer with an AMD GX 500 processor The board is compatible with popular operating systems such as Windows QNX VxWorks and Linux The EPM 5 features high reliability design and construction including latching I O connectors voltage sensing reset circuits and self resetting fuses on the 5V supply to the USB ports E...

Page 8: ... Up to 1280 x 1024 24 bits Standard RGB analog output VESA DDC not supported LVDS output for TFT FPDs IDE Interface One channel 44 pin 2mm connector Supports up to and including UDMA5 Supports two Parallel ATA IDE devices hard drive CD ROM CF etc Compact Flash Shares IDE channel master or slave Ethernet Interface Intel 82551ER based 10 100 Fast Ethernet Controller COM1 Interface RS 232 16C550 comp...

Page 9: ...MHz 48 000 MHz PWRBTN SOFT PWR BUTTON ACPI DISABLE JUMPER PCI Connector USB 2 0 4 Ports RS 485 422 2 Ports Connector I O Connector Intel 82155ER 10 100M IDE RS 232 CPLD ISA Bridge AMD GX2 CPU AMD CS5536 I O Companion Series Terms System Clocking MK1491 09 FP LVDS National DS90C383A FS2 JTAG Pads Audio Series Terms CompactFlash Connector BIOS ISA Connector ACPI Disable PWR Control PCI Arbitration S...

Page 10: ...2 3A 1 2V 200 mA 3 3V 1 4A DDR VTT REF DDR VTT REF2 CPU VMEM CPU VCORE CS5536 VCORE CPU and CS5536 VIO POR TO CS5536 CS5536 Standby CS5536 CPLD Standby CS5536 Standby RI1 RING INDICATOR EIRQ1_3V EXTERNAL WAKE PWRBTN SOFT PWR BUTTON WORK_AUX EN PWR EN PWR LTC3412 LTC3412 LTC3412 I809 Si233DS MOSFET RESISTOR DIVIDER RESISTOR DIVIDER LTC3025 PWR CONTROL TPS79912 TPS79933 ...

Page 11: ... 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 Warnings ELECTROSTATIC DISCHARGE Warning Electrostatic discharge ESD can damage circuit boards disk drives and other components The cir...

Page 12: ...e disassemble or dispose of in fire Dispose of used batteries promptly and in an environmentally suitable manner HANDLING CARE Warning Care must be taken when handling the board not to touch the exposed circuitry with your fingers Though it will not damage the circuitry it is possible that small amounts of oil or perspiration on the skin could have enough conductivity to cause the contents of CMOS...

Page 13: ... number The name of a technician or engineer that can be contacted if any questions arise Quantity of items being returned The model and serial number barcode of each item A detailed description of the problem Steps you have taken to resolve or recreate the problem The return shipping address Warranty Repair All parts and labor charges are covered including return shipping charges for UPS Ground d...

Page 14: ...CBR indicates RoHS compliance CBL indicates RoHS noncompliance For applications that require RoHS compliance use only the RoHS compliant CBR version cables You will also need a Windows or other OS installation CD Basic Setup The following steps outline the procedure for setting up a typical development system The EPM 5 should be handled at an ESD workstation or while wearing a grounded antistatic ...

Page 15: ...attach the breakout board CBL 5010B to the cable The cable and board are shipped attached Plug a USB keyboard and USB floppy drive into socket J4 of the breakout board Plug the hard drive data cable CBL CBR 4406 into socket J7 Attach a hard drive and CD ROM drive to the connectors on the cable If the hard drive is 3 5 use the 2mm to 0 1 adapter CBL CBR 4405 to attach the IDE cable Attach an ATX po...

Page 16: ...uration and set or verify the following settings DRIVE ASSIGNMENT ORDER Drive C Ide 0 Pri Master ATA DRV ASSIGNMENT Ide 0 3 AUTOCONFIG LBA ATA DRV ASSIGNMENT Ide 1 5 IDE CDROM BOOT ORDER Boot 1st CDROM BOOT ORDER Boot 2nd Drive C Before saving the CMOS Setup settings insert the Windows or other OS installation disk in the CD ROM drive so it will be accessed when the system reboots Press ESC and se...

Page 17: ...ppy 0 Not installed Ide 2 3 AUTOCONFIG LBA Ext Floppy 1 Not installed Ide 3 3 AUTOCONFIG LBA 235MB Features Configuration System BIOS Setup Features Configuration C 2005 General Software Inc All rights reserved ACPI 1 0 Enabled System Management Mode Enabled Advanced Power Management Enabled Splash Screen Disabled System Management BIOS Enabled Firmbase Instrumentation Disabled Primary IDE UDMA En...

Page 18: ...figuration C 2005 General Software Inc All rights reserved Shadowing Chipset Shadow 16KB ROM at C000 Enabled Shadow 16KB ROM at C400 Enabled Shadow 16KB ROM at C800 Disabled Shadow 16KB ROM at CC00 Disabled Shadow 16KB ROM at D000 Disabled Shadow 16KB ROM at D400 Disabled Shadow 16KB ROM at D800 Disabled Shadow 16KB ROM at DC00 Enabled Shadow 16KB ROM at E000 Enabled Shadow 16KB ROM at E400 Enable...

Page 19: ...with all PC 104 Plus standards Dimensions are given below to help with pre production planning and layout Figure 4 EPM 5 Dimensions and Mounting Holes Not to scale All dimensions in inches 3 3 CPU 0 20 3 175 3 375 3 275 0 10 0 00 0 15 3 05 3 5375 0 3875 0 1875 0 00 3 15 3 3375 3 575 0 20 ...

Page 20: ... 14 SIDE PROFILE Figure 5 EPM 5 Side Profile Not to scale All dimensions in inches Figure 6 CBL CBR 5010 Dimensions and Mounting Holes Not to scale All dimensions in inches 1 95 1 575 1 875 1 38 0 065 5 50 5 10 1 175 0 44 0 40 0 50 0 44 0 06 ...

Page 21: ...cured to a base plate When bolting the unit down make sure to secure all four standoffs to the mounting surface to prevent circuit board flexing Standoffs are secured to the top circuit board using four pan head screws See page 13 for dimensional details Standoffs and screws are available as part number VL HDW 101 An extractor tool is available part number VL HDW 201 to separate the PC 104 modules...

Page 22: ... Top Not to scale J3 Factory use only J4 Ethernet J5 LPT J7 IDE J1 Video Output J8 Standard I O COM USB timer inputs reset speaker LED J9 Main Power CPU J7 IDE Pin 1 J10 PC 104 B1 A1 C0 D0 B32 C19 D19 A32 D1 C1 B1 A1 D30 C30 B30 A30 2 1 10 9 43 44 1 2 49 50 1 2 J2 PC 104 Plus 2 1 2 1 20 19 12 11 J13 Audio 1 2 7 8 Battery ...

Page 23: ...nual 17 EPM 5 CONNECTOR LOCATIONS BOTTOM Figure 9 Connector Locations Bottom Not to scale PC 104 Plus pass through male J12 LVDS J6 CompactFlash PC 104 pass through male Pin 1 D1 C1 B1 A1 D30 C30 B30 A30 B1 A1 C0 D0 C19 D19 B19 A19 20 1 ...

Page 24: ...45 3 000 2 545 36 J5 LPT port FCI 89947 720 CBL 2003 or CBR 2003 1 20 pin 2mm latching IDC 25 pin F D Sub 0 191 1 825 31 J6 CompactFlash Type I or Type II CompactFlash 2 996 0 743 J7 IDE Hard Drive Channel 1 FCI 89947 144 CBL 4406 or CBR 44062 1 44 pin 2mm latching two 44 pin 2mm 3 153 2 227 27 J8 COM ports USB ports DB 9 timer inputs push button reset PC speaker LED FCI 89361 350LF CBL 5009A or C...

Page 25: ...tor Description J1 High Density Connector FCI 98414 F06 50ULF 2mm 50 pin keyed latching header J2 ACPI Pushbutton Input Conta Clip 10250 4 5 pin screw terminal J3 COM1 Kycon K42 E9P P A4N DB 9 male J4 USB 0 3 USB Type A USB Type A J5 COM4 Conta Clip 10250 4 5 pin screw terminal J6 COM3 Conta Clip 10250 4 5 pin screw terminal J1 Paddle Board J5 COM4 J6 COM3 J3 COM1 J4 USB0 3 IDE LED top PLED bottom...

Page 26: ...Physical Details EPM 5 Reference Manual 20 Jumper Blocks JUMPERS AS SHIPPED CONFIGURATION Figure 11 Jumper Block Locations J7 ID CPU 2 2 1 1 2 4 6 1 3 5 7 8 V1 V2 V3 V4 3 1 2 3 1 2 V5 ...

Page 27: ...A and B terminated with 127 Ohms Out No termination Note Places terminating resistor across COM4 RS 485 TXRX TXRX or RS 422 RX RX differential pair In 27 V4 1 2 SDMASTER In Compact Flash Master Device Out Compact Flash Slave Device In V4 3 4 Video BIOS Selector In Primary Video BIOS selected Out Secondary Video BIOS selected Note The secondary Video BIOS is field upgradeable using the BIOS upgrade...

Page 28: ...rop Some manufacturers include a pin 1 indicator on the crimp housing that corresponds to pin 10 of the pinout shown in Figure 12 Table 4 Main Power Connector Pinout J9 Pin Signal Name Description 1 GND Ground 2 5VDC Power Input 3 GND Ground 4 12VDC Power Input 5 GND Ground 6 12VDC Power Input 7 3 3VDC Power Input 8 5VDC Power Input 9 GND Ground 10 5VDC Power Input Figure 12 shows the VersaLogic s...

Page 29: ...face 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 Normal battery voltage should be at least 3 0V If the voltage drops below 3 0V contact the factory for a replacement part number T HB3 0 1 The life expectancy under norm...

Page 30: ...l BIOS Information page for details Warning If CMOS Setup default settings make the system unbootable and prevent the user from entering CMOS Setup the EPM 5 needs to be serviced by the factory DEFAULT CMOS RAM SETUP VALUES After CMOS RAM is cleared the system will load default CMOS RAM parameters the next time the board is powered on The default CMOS RAM setup values will be used in order to boot...

Page 31: ...ents of main memory when the computer wakes from standby are the same as when it was put into standby SETUP To set up the EPM 5 to use ACPI power management 1 Verify that the CMOS Setup ACPI 1 0 setting is set to Enabled This is the default setting 2 If you plan to use a pushbutton or relay for wakeup remove the jumper from jumper block V4 7 8 Removing this jumper enables the ACPI pushbutton inter...

Page 32: ...fore doing so BOOL SetSystemPowerState BOOL fSuspend BOOL fForce Parameters fSuspend in If this parameter is TRUE the system is suspended If the parameter is FALSE the system hibernates This parameter is ignored in Windows Me 98 95 fForce in If this parameter is TRUE the function broadcasts a PBT_APMSUSPEND event to each application and driver then immediately suspends operation If the parameter i...

Page 33: ...Setup its I O address space is available to the PC 104 ISA bus All serial ports are protected against ESD damage This protection exceeds the 15KV human body model COM PORT CONFIGURATION There is no configuration jumper for COM1 because it operates only in RS 232 mode Jumper block V3 and V5 are for termination of the RS 422 485 differential pairs See the Jumper Summary on page 21 for details on ter...

Page 34: ... in the data cable Table 5 J7 IDE Hard Drive Connector Pinout Pin Signal Name Function Pin Signal Name Function 1 Reset Reset signal from CPU 23 DIOW I O write 2 Ground Ground 24 Ground Ground 3 DD7 Data bus bit 7 25 DIOR I O read 4 DD8 Data bus bit 8 26 Ground Ground 5 DD6 Data bus bit 6 27 IORDY I O ready 6 DD9 Data bus bit 9 28 CSEL Cable select 7 DD5 Data bus bit 5 29 DMACK DMA acknowledge 8 D...

Page 35: ...32 J4 BM1 5V Protected 7 4 Data Terminal Ready 33 BM3 Channel 2 Data 8 9 Ring Indicator 34 BM2 Channel 2 Data 9 5 Ground 35 USB3 B4 Ground 10 Ground 36 J4 B1 5V Protected COM3 RS 422 RS 485 37 B3 Channel 3 Data 11 J6 5 TxD note 38 B2 Channel 3 Data 12 4 TxD note 39 ACPI Push 3 Ground 13 1 Ground Ground 40 button J2 4 EIRQ1 14 3 RxD TxD RxD 41 reserved 15 2 RxD TxD RxD 42 reserved 16 Ground Ground ...

Page 36: ...n changing the register make sure not to alter the value of the other bits The following code examples show how to turn the LED on and off Refer to page 41 for further information LED On LED Off MOV DX 1D0H MOV DX 1D0H IN AL DX IN AL DX OR AL 80H AND AL 7FH OUT DX AL OUT DX AL Note The LED is turned on by the BIOS during system startup This causes the light to function as a power on indicator if i...

Page 37: ...OS Setup This connector uses IEC 61000 4 2 rated TVS components to help protect against ESD damage Table 7 LPT1 Parallel Port Pinout J5 Pin Centronics Signal Signal Direction 1 Strobe Out 2 Auto feed Out 3 Data bit 1 In Out 4 Printer error In 5 Data bit 2 In Out 6 Reset Out 7 Data bit 3 In Out 8 Select input Out 9 Data bit 4 In Out 10 Data bit 5 In Out 11 Data bit 6 In Out 12 Data bit 7 In Out 13 ...

Page 38: ...w the system to boot off of the Secondary Video BIOS Unlike the Primary Video BIOS the Secondary Video BIOS can be reprogrammed in the field SVGA OUTPUT CONNECTOR See the Connector Location Diagram on page 16 for connector location information An adapter cable part number CBL CBR 1201 is available to translate J1 into a standard 15 pin D Sub SVGA connector This connector uses IEC 61000 4 2 rated T...

Page 39: ...to pins 19 and 20 of J12 is protected by a 1 Amp fuse See the Connector Location Diagram on page 16 for connector location information Table 9 LVDS Flat Panel Display Pinout J12 Pin Signal Name Function 1 GND Ground 2 NC No Connection 3 LVDSA3 Diff Data 3 4 LVDSA3 Diff Data 3 5 GND Ground 6 LVFSCLK0 Differential Clock 7 LVDSCLK0 Differential Clock 8 GND Ground 9 LVDSA2 Diff Data 2 10 LVDSA2 Diff D...

Page 40: ...Windows driver CONSOLE REDIRECTION The EPM 5 can be operated without using the onboard video output by redirecting the console to COM1 CMOS Setup and some operating systems such as DOS can use this console for user interaction In the Features Configuration screen there is an option to control console redirection This option can be set to Auto or Redirect When set to Auto the console will not be re...

Page 41: ...owing diagram illustrates a typical DB9 to DB9 RS 232 null modem adapter System 1 System 2 Name Pin Pin Name TX 3 2 RX RX 2 3 TX RTS 7 1 DCD CTS 8 DSR 6 4 DTR DCD 1 7 RTS 8 CTS DTR 4 6 DSR Pins 7 and 8 are shorted together on each connector Unlisted pins have no connection ...

Page 42: ...used to select the IRQ line routed to each PCI interrupt line STATUS LED The EPM 5 includes an on board two colored LED to provide an indication of the Ethernet status as follows Green LED Link ON Active Ethernet cable plugged in OFF Active cable not plugged in or cable not plugged into active hub Yellow LED Activity ON Activity detected on cable OFF No Activity detected on cable ETHERNET CONNECTO...

Page 43: ...outed to INTB The audio controller can be disabled within CMOS Setup Table 11 J13 Audio Connector Pin Signal Name Function 1 LINE_OUTR Line Out Right 2 Ground Ground 3 LINE_OUTL Line Out Left 4 Ground Ground 5 LINE_INR Line In Right 6 Ground Ground 7 LINE_INL Line In Left 8 Ground Ground CPU Temperature Monitor A thermometer circuit constantly monitors the die temperature of the CPU This circuit c...

Page 44: ... cycles low byte then high byte on the PC 104 bus The PLD code that enables 16 bit transfers can be installed on Rev 5 00 boards See KnowledgeBase article VT1477 PLD and BIOS 5 3 104 Update Instructions Later PLD updates are also available To access them search the VersaTech KnowledgeBase on the keywords EPM 5 PLD PC 104 MEMORY SUPPORT Memory ranges supported CC000h DBFFFh 8 bit transfers only IRQ...

Page 45: ...m RAM I O Map The following table lists the common I O devices in the EPM 5 I O map User I O devices should be added using care to avoid the devices already in the map as shown in the following table Table 13 On Board I O Devices I O Device Standard I O Addresses Special Control Register 1D0h Jumper and Status Register 1D2h RS 485 422 Tx Rx Control Register 1DAh Reserved 1E0h Primary Hard Drive Co...

Page 46: ...z PCI INTB z PCI INTC z PCI INTD z Table 15 PCI Interrupt Settings z default setting allowed setting PCI Interrupt Source INTA INTB INTC INTD Ethernet z Audio z USB z Notes If your design needs to use interrupt lines on the PC 104 bus IRQ10 is recommended IRQ3 and IRQ4 are normally used by COM ports on the main board On boards prior to Rev 5 00 PC 104 IRQ3 B25 was bonded to PC 104 IRQ7 B21 and PC ...

Page 47: ...Bit Mnemonic Description D7 PLED Light Emitting Diode Controls the programmable LED on connector J4 0 Turns LED on 1 Turns LED off D6 Reserved Reserved This bit has no function D5 OVERTEMP Temperature Status Indicates CPU temperature 0 CPU temperature is below value set in the CMOS setup 1 CPU temperature is above value set in the CMOS setup Note This bit is a read only bit D4 D0 Reserved Reserved...

Page 48: ...are hard coded to represent the product type The EPM 5 always reads as 00011 Other codes are reserved for future products PC4 PC3 PC2 PC1 PC0 Product Code 0 0 1 0 0 EPM 5 Note These bits are read only D2 EXT Extended Temperature Indicates operating temperature range 0 Standard temperature range 1 Extended temperature range D1 D0 REV Revision Level These bits represent the EPM 5 circuit revision le...

Page 49: ...Description D7 Reserved This bit has no function D6 VB SEL Video BIOS Selection Indicates the status of jumper 0 Jumper out Secondary Video BIOS selected 1 Jumper in Primary Video BIOS selected Note This is a read only bit D5 SB SEL System BIOS Selection Indicates the status of jumper 0 Jumper out Master System BIOS selected 1 Jumper in Run Time System BIOS selected Note This is a read only bit D4...

Page 50: ...rols RS 422 Tx on COM4 0 Disable RS 422 transmitter on COM4 1 Enable RS 422 transmitter on COM4 Note This is a write only bit D3 Reserved Reserved This bit has no function D2 COM3TE485 COM3 RS 485 Transmit Enable Controls RS 485 Tx on COM3 0 Disable RS 485 transmitter on COM3 1 Enable RS 485 transmitter on COM3 Note This is a write only bit D1 COM3RE4XX COM3 RS 485 422 Receive Enable Controls RS 4...

Page 51: ...l Corporation Intel 82551ER Video Controller In chipset PC 104 Specification PC 104 Consortium PC 104 Resource Guide PC 104 Plus Specification VersaLogic Corporation PC 104 Resource Guide General PC Documentation Microsoft Press The Programmer s PC Sourcebook General PC Documentation Powell s Books The Undocumented PC A A ...

Page 52: ...MHz Y1 crystal U7 82551ER chip RTC 32 768 kHz Y2 crystal U13A CS5536 chip System Clock 14 318 MHz Y3 crystal U34 MK1491 09F chip REF Clock IOAPC Clock PCI Clock 14 318 MHz 14 318 MHz 33 3 MHz USB 48 MHz Y4 crystal U13B CS5536 chip Audio 24 576 MHz Y5 crystal U44 AD1981B chip PCI Bus 33 3 MHz Fixed frequency ISA Bus 8 MHz VCore Switching Register 1 MHz Switching frequency Memory 111 MHz or 222 tran...

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