Ampro Corporation Littleboard 550 DCD1, DSR1, RXD1, RTS1, TXD1, CTS1, DTR1, Key, DCD2, DSR2, RXD2

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Chapter 3

Hardware

Table 3-14. Serial A Interface Pin/Signal Descriptions (J11)

Pin #

Pin #

Signal

Description

 

DB9

 

 

1

1

DCD1*

Data Carrier Detect 1 – Indicates external serial communications device

 

(COM1)

 

is detecting a carrier signal (i.e., a communication channel is currently

 

 

 

open). In direct connect environments, this input will be driven by DTR1

 

 

 

as part of the DTR/DSR handshake.

2

6

DSR1*

Data Set Ready 1 – Indicates external serial communications device is

 

 

 

powered, initialized, and ready. Used as hardware handshake with DTR1

 

 

 

for overall readiness to communicate.

3

2

RXD1

Receive Data 1 – Serial port 1 receive data in.

 

 

RX1-

RX1- – If in RS485 or RS422 mode, this pin is Receive Data 1 -.

4

7

RTS1*

Request To Send 1 – Indicates Serial port 1 is ready to transmit data.

 

 

 

Used as hardware handshake with CTS1 for low level flow control..

 

 

TX1+

TX1+ – If in RS485 or RS422 mode, this pin is Transmit Data 1 +.

 

 

 

 

5

3

TXD1

Transmit Data 1 – Serial port 1 transmit data out.

 

 

TX1-

TX1- – If in RS485 or RS422 mode, this pin is Transmit Data 1 -.

 

 

 

 

6

8

CTS1*

Clear To Send 1 – Indicates external serial communications device is

 

 

 

ready to receive data. Used as hardware handshake with RTS1 for low

 

 

 

level flow control.

 

 

RX1+

RX1+ – If in RS485 or RS422 mode, this pin is Receive Data 1 -.

7

4

DTR1*

Data Terminal Ready 1 – Indicates Serial port 1 is powered, initialized,

 

 

 

and ready. Used as hardware handshake with DSR1 for overall readiness

 

 

 

to communicate.

8

9

RI1*

Ring Indicator 1 – Indicates external serial communications device is

 

 

 

detecting a ring condition. Used by software to initiate operations to

 

 

 

answer and open the communications channel.

9

5

GND

Ground

 

 

 

 

10

NC

KEY/

Key

 

 

NC

Not connected

 

 

 

 

11

1

DCD2*

Data Carrier Detect 2 – Indicates external serial communications device

 

(COM2)

 

is detecting a carrier signal (i.e., a communication channel is currently

 

 

 

open). In direct connect environments, this input will be driven by DTR2

 

 

 

as part of the DTR/DSR handshake.

12

6

DSR2*

Data Set Ready 2 – Indicates external serial communications device is

 

 

 

powered, initialized, and ready. Used as hardware handshake with DTR2

 

 

 

for overall readiness to communicate.

13

2

RXD2

Receive Data 2 – Serial port 2 receive data in

 

 

RX2-

RX1- – If in RS485 or RS422 mode, this pin is Receive Data 2 -.

 

 

 

 

14

7

RTS2*

Request To Send 2 – Indicates Serial port 2 is ready to transmit data.

 

 

 

Used as hardware handshake with CTS2 for low level flow control.

 

 

TX2+

TX2+ – If in RS485 or RS422 mode, this pin is Transmit Data 2 +.

15

3

TXD2

Transmit Data 2 – Serial port 2 transmit data out

 

 

TX2-

TX2- – If in RS485 or RS422 mode, this pin is Transmit Data 2 -.

44

Reference Manual

LittleBoard 550

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Contents LittleBoard Single Board Computer Reference Manual Audience Assumptions Contents Appendix a List of Tables Table A-1 Reference Material SpecificationsPurpose of this Manual Other LittleBoard Products Related Ampro ProductsLittleBoard 550 Support Products Other Ampro Products Chapter Product Overview EBX ArchitectureProduct Description Stacking PC/104 Modules with the LittleBoardBoard Features Chapter Chapter Block Diagram ATAVIA Major Integrated Circuits ICsChip Type Mfg Model Description Function CPUAdditional Components Connector DefinitionsJack # Signal Description DIMM1Northb Indicator Definition Jumper # Installed Removed/InstalledDefault Jumper DefinitionsThb Dimension SpecificationsPhysical Specifications Mechanical Specifications LittleBoard 550 Dimensions Top view, #1115 705 415 730 200 050 350 800 600 385 345 Thermal/Cooling Requirements Power SpecificationsEnvironmental Specifications Reference Manual LittleBoard Overview USBSdram Memory DIMM1 CPU U1Memory Flash Memory U17Interrupt Channel Assignments Memory MapAddress hex Subsystem Address MapBase Address Function VGAPin # Signal Input Description Output PC/104-Plus Interface J21GNT1 IDSEL0REQ0 CLK2Intd REQ2CLK0 IntaGNT2 IDSEL1REQ1 CLK3GNT0 IDSEL2IDSEL3 CLK1Pin # Signal Description J1 Row a PC/104 Interface J1A,B,C,DPin # Signal Descriptions J1 Row B DACK1 DACK3DRQ3 DRQ1Pin # Signal Descriptions J1 Row C Pin # Signal Descriptions J1 Row DDACK0 IRQ15IRQ14 DRQ0Pin # Signal Description IDE Interface J12, J17Pdior PdreqPdiow PdiordySDD9 SDD8SDD6 SDD5SDA2 SDA1SDA0 SDCS1#VCC CompactFlash Adapter J23PDCE1 PDCE2 PdrstFloppy Drive Interface J14 Pin # Signal In/Out Description Parallel Port Interface J15Serial Interfaces J11, J13 RS485 Serial Port ImplementationRXD1 DCD1DSR1 RTS1DCD3 CTS2DTR2 DSR3RXD4 DCD4DSR4 RTS4Utility Interfaces Utility 1 Interface J16System Management Bus SMBus Utility 2 Interface J24Mouse Interface Sdram Eprom USB Signals USB0 and USB1Component Address Binary Batlow SuscPwrbt MdataUSB Signals USB2 and USB3 Utility 3 Interface J18Ethernet Interfaces J7, J32 TX+Audio Interface J28 Videor VideolVideognd CDLVideo Interfaces J3, J4, J5, J31 CRT InterfaceLCD Interface Enavdd Pin # Signal Description Line Channel Lvds InterfaceMiscellaneous Temperature MonitoringOops! Jumper Bios Recovery Real Time Clock RTCWatchdog Timer Hot Cable JumperCPU Fan Power Interface J10Power Monitor TAGReference Manual LittleBoard Accessing Bios Setup VGA Display IntroductionAccessing Bios Setup Serial Console Bios Setup Menu Item/TopicBios Menus Bios Setup Opening ScreenDate & Time Bios Configuration ScreenDrive Configurations and Boot Options Drive Assignment# of Floppy Drives Bios Settings Boot Order Drive and Boot OptionsUser Interface Keyboard and Mouse ConfigurationUser Interface Options Memory Control Options MemoryAdvanced features Power Management and Advanced User OptionsPower Management On-Board Serial Ports On-Board LPT Port On-Board Video Video, Flat Panel, and Audio OptionsOn-Board Controllers PCI, Plug n Play, and Interrupt Assignments Chapter Bios Setup Chapter Bios Setup Chapter Bios Setup Converting the Splash Screen File Splash Screen CustomizationSplash Screen Image Requirements \splashconvert convert.idf Appendix a Technical Support Method Contact InformationAppendix a Technical Support Connector Designation Pin # Mfg Part Number Appendix B Appendix C LAN Boot Option PXE Boot Agent Bios Setup Accessing PXE Boot Agent Bios SetupTCP/IP Configuration PXE Boot Agent Setup ScreenPXE Configuration NetWare Configuration RPL ConfigurationCD-ROM CRTDocumentation and Support Software Doc & SW CD-ROM PostSupported features WDTReference Manual LittleBoard