Diamond Power Products MM-48-AT user manual Polarity and logic readback

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Tables describing behavior of POL jumper, opto inputs, and edge detection

The POL bit is the inverse of the POL pin. Non-inverted inputs means the opto bit is reported as the inverse of the corresponding input pin, since the opto circuit has a built-in inversion.

Edge detection always operates with respect to the actual input voltage, not the logic. Rising always means from 0V to 3V, and falling always means from 3V to 0V.

1. Polarity and logic readback

POL jumper	POL pin	POL bit	Opto state	Opto input pin Opto databit
Case 1: Non-inverted inputs
Out	1	0	0-1.5VDC	1	0
Out	1	0	3-28VDC	0	1
Case 2: Inverted inputs
In	0	1	0-1.5VDC	0	1
In	0	1	3-28VDC	1	0

2. Edge detection (assumes OENn = 1 to enable edge detection)

The POL pin and POL bit operate in the same manner as above. Note that the behavior of the edge detection circuit does not depend on the POL jumper. The POL jumper only affects the meaning of 0 and 1 in the reported opto data bits.

POL jumper	POLn bit	Opto change	Pin change	Opto data bit	EDGEn
Case 1: Non-inverted inputs
Out	0	0V -> 3V	1 -> 0	0 -> 1	No change
Out	0	3V -> 0V	0 -> 1	1 -> 0	1
Out	1	0V -> 3V	1 -> 0	0 -> 1	1
Out	1	3V -> 0V	0 -> 1	1 -> 0	No change
Case 2: Inverted inputs
In	0	0V -> 3V	1 -> 0	1 -> 0	No change
In	0	3V -> 0V	0 -> 1	0 -> 1	1
In	1	0V -> 3V	1 -> 0	1 -> 0	1
In	1	3V -> 0V	0 -> 1	0 -> 1	No change

Diamond-MM-48-AT User Manual V1.01

Page 39

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Contents DIAMOND-MM-48-AT Table of Contents Description DIAMOND-MM-48-AT Board Drawing Signal Name Definition O Header Pinout and PIN DescriptionJ3 Analog and Digital I/O Signal Name Definition Relay output contacts J4 Relays and OptocouplersOptoisolated input contacts Interrupt Level Selection Board ConfigurationBase Address Base Address Jumper Position Hex DecimalOptocoupler Polarity ReservedAnalog Input Range Overview Base + Write Function Read FunctionLSB MSB Read operations Register Map Bit AssignmentsWrite operations DA7 DA6 DA5 DA4 DA3 DA2 DA1 DA0Base + Read Register DefinitionsBase + Write DefinitionsAD9 AD8 Base + Read/Write A/D Channel RegisterHIGH3 HIGH2 HIGH1 HIGH0 LOW3 LOW2 LOW1 LOW0 DIR3 DIR2 DIR1 DIR0 Base + Read/Write Digital I/O Configuration RegisterBase + Read/Write Relay Control Port RELAY7 RELAY6 RELAY5 RELAY4 RELAY3 RELAY2 RELAY1 RELAY0OEN3 OEN2 OEN1 OEN0 POL3 POL2 POL1 POL0 DIO3 DIO2 DIO1 DIO0Base + Read Digital I/O Data and Edge Status DEDGE3 DEDGE2 DEDGE1 DEDGE0 DIO3 DIO2 DIO1 DIO0Base + Write Channel and Control Register Daupdt DACH2 DACH1 DACH0OEDGE3 OEDGE2 OEDGE1 OEDGE0 OPTO3 OPTO2 OPTO1 OPTO0 Dapre Daprld Reset Fiforst Adstart Base + Write Command RegisterPOL ADCH3 ADCH2 ADCH1 ADCH0 Base + Read Status RegisterCKSEL1 CKFRQ1 CKFRQ0 Scnint Clken Clksel Base + Write Configuration RegisterAdbusy Dabusy CKSEL1 CKFRQ1 CKFRQ0 Scnint Clken Clksel Base + Read Configuration & Status RegisterOVF Fifoth Fifoen Scanen Base + Write Fifo Control RegisterFifoth Fifoen Scanen Base + Read Fifo Status RegisterClrt Clrd Clro Clra Tinte Dinte Ointe Ainte Base + Write Interrupt Control RegisterTint Dint Oint Aint Tinte Dinte Ointe Ainte Base + Read Interrupt Status RegisterBase + Read/Write Counter/Timer D7 Base + Read/Write Counter/Timer D15Base + Read/Write Counter/Timer D23 Base + Write Counter/Timer Control Register Ctrno Latch Gtdis Gten Ctdis Cten Load CLRCtrno Base + Read/Write Eeprom / TrimDAC Address Register Base + Read/Write Eeprom / TrimDAC Data RegisterBase + Read Fpga Revision Code Base + Write Eeprom Access Key RegisterBase + Write Calibration Control Register Base + Read Calibration Status RegisterSingle Ended and Differential Inputs Analog Input Ranges and ResolutionResolution Input RangesPerforming AN A/D Conversion LSB = readbase MSB = readbase+1 Data = MSB * 256 + LSB Trigger an A/D conversion on the current channelInput voltage = A/D value / 32768 * Full-scale voltage Conversion or Scan D SCAN, FIFO, and Interrupt OperationTrigger Clken ClkselFifoen = Fifo OperationInterrupt Operation Fifoen Fifoth ScanenGuidelines for Selecting Fifo Use Fifoen and Fifoth Operation TableAinte Fifoen Scanen Analog Output Overview Generating AN Analog Output 12.3 D/A Calibration Autocalibration OperationReference Voltages 12.2 A/D calibrationDigital I/O Operation Optocoupler Operation Procedure for enabling interrupts on selected edgesPolarity and logic readback Edge detection assumes OENn = 1 to enable edge detectionRelay Operation COUNTER/TIMER Operation Counter 0 A/D Sample ControlCounter 1 Counting/Totalizing Functions Counter Command SequencesCounter Outpbase+15,0x01 Outpbase+15,0x81 Specifications AutocalibrationGeneral