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System Features............................................................................................................44
System Resources...................................................................................................44
Console Redirection to a Serial Port........................................................................44
Flash Memory..........................................................................................................45
Backup Battery.........................................................................................................45
System Reset...........................................................................................................46
On-Board Video.......................................................................................................46
System I/O......................................................................................................................47
Ethernet....................................................................................................................47
Serial Ports...............................................................................................................47
PS/2 Ports................................................................................................................48
USB Ports................................................................................................................48
Data Acquisition Circuit................................................................................................50
Data Acquisition Circuitry I/O Map...........................................................................51
I/O Register Summary.............................................................................................53
I/O Register Definitions............................................................................................55
Enabling Enhanced Features.......................................................................................76
Enhanced Mode.......................................................................................................76
Normal Mode............................................................................................................76
Analog-to-Digital Input Ranges and Resolution.........................................................77
Overview..................................................................................................................77
Unipolar and Bipolar Inputs......................................................................................77
Input Ranges and Resolutions.................................................................................77
A/D Conversion Formulas........................................................................................78
Performing an A/D Conversion....................................................................................80
Select the Input Channel..........................................................................................80
Select the Input Range............................................................................................81
Wait for Analog Input Circuit to Settle......................................................................81
Perform an A/D Conversion on the Current Channel..............................................81
Wait for the Conversion to Finish.............................................................................81
Read the Data from the Board.................................................................................81
Convert the numerical data to a meaningful value..................................................82
A/D Sampling Methods..................................................................................................83
Sampling Modes......................................................................................................83
FIFO Description......................................................................................................84
Scan Sampling.........................................................................................................84
Sequential Sampling................................................................................................84
How To Perform Conversions Using Interrupts.........................................................85
Diamond Systems Corporation
Poseidon User Manual
Page 3