Diamond Systems 16-Channel 12-Bit Analog Output PC/104 Module, RUBY-MM-1612 Mode 2 Combinations

Page 31

 

 

 

 

 

 

 

 

 

 

82C55A

 

 

 

 

 

 

 

 

 

MODE 2 AND MODE 0 (INPUT)

 

 

 

MODE 2 AND MODE 0 (OUTPUT)

 

 

 

 

 

 

 

 

 

 

PC3

 

INTRA

 

 

 

 

 

 

 

 

PC3

INTRA

 

 

 

 

 

 

 

 

PA7-PA0

8

 

 

 

 

 

 

 

 

 

PA7-PA0

8

 

 

 

 

 

 

 

 

PC7

 

OBFA

 

 

 

 

 

 

 

 

PC7

OBFA

CONTROL WORD

 

 

 

 

 

 

CONTROL WORD

 

 

 

 

 

D7 D6

D5

D4

D3

D2

D1

D0

PC6

 

ACKA

D7 D6

D5

D4

D3

D2

D1

D0

PC6

ACKA

1

1

 

 

 

0

1

1/0

PC4

 

STBA

1

1

 

 

 

0

0

1/0

PC4

STBA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC2-PC0

 

 

PC5

 

IBFA

 

 

 

 

PC2-PC0

 

 

PC5

IBFA

 

 

 

 

1 = INPUT

 

 

 

 

 

 

 

1 = INPUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 = OUTPUT

 

PC2-PC0

3

I/O

 

 

 

 

0 = OUTPUT

 

PC2-PC0

3

 

 

 

 

 

RD

 

 

 

 

 

 

 

 

RD

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PB7-PB0

8

 

 

 

 

 

 

 

 

 

PB7, PB0

8

 

 

 

 

 

WR

 

 

 

 

 

 

 

 

 

WR

 

 

 

MODE 2 AND MODE 1 (OUTPUT)

 

 

 

MODE 2 AND MODE 1 (INPUT)

 

 

 

 

 

 

 

 

 

 

PC3

 

INTRA

 

 

 

 

 

 

 

 

PC3

INTRA

 

 

 

 

 

 

 

 

PA7-PA0

8

 

 

 

 

 

 

 

 

 

PA7-PA0

8

 

 

 

 

 

 

 

 

PC7

 

OBFA

 

 

 

 

 

 

 

 

PC7

OBFA

CONTROL WORD

 

 

 

PC6

 

ACKA

CONTROL WORD

 

 

 

PC6

ACKA

D7

D6

D5

D4

D3

D2

D1

D0

 

D7

D6

D5

D4

D3

D2

D1

D0

PC4

 

 

PC4

 

1

1

 

 

 

1

0

 

 

STBA

1

1

 

 

 

1

1

 

STBA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PC5

 

IBFA

 

 

 

 

 

 

 

 

PC5

IBFA

 

 

 

 

 

 

 

 

PB7-PB0

8

 

 

 

 

 

 

 

 

 

PB7-PB0

8

 

 

 

 

 

RD

 

 

PC1

 

OBFB

 

 

 

 

 

RD

 

 

PC2

STBB

 

 

 

 

 

 

 

PC2

 

ACKB

 

 

 

 

 

 

 

PC1

IBFB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WR

 

PC0

 

INTRB

 

 

 

 

 

WR

 

PC0

INTRB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIGURE 14. MODE 2 COMBINATIONS

12

Page 30 Page 32
Image 31
Page 30 Page 32
Contents
RUBY-MM-1612 Table of Contents Description O Header Pinout Signal Name DefinitionBase Address Configuration Header J5 Position Hex Decimal Board ConfigurationBase Address Full-Scale Voltage Analog Output Range ConfigurationAdjustable Reference Voltage On-Board Reference Full-Scale Voltage SelectionAnalog Output Configuration Header J4 Range RUBY-MM-1612 Board Drawing Ruby-MM-1612 I/O Map Reset informationBase + Write Function Read Function Base + 1, Write DAC MSB register Base + 0 or 1, Read Update DACsRegister Definitions Base + 0, Write DAC LSB registerBase + 3, Write External trigger register Definitions Configuration Register82C55 Digital I/O Chip Operation 82C55 Register MapFull Scale 1LSB Analog Output Ranges and ResolutionFull Scale 10. D/A Code Computation LSB = 1/2048 x Full-Scale Voltage Offset Binary Coding for bipolar output rangesOutput Code Explanation Output Voltage for ±5V Range Hardware Update Command HOW to Generate AN Analog OutputTo generate an analog output on one or more channels Two channel output Examples Single channel outputCalibration Procedure Miscellaneous SpecificationsPinouts FeaturesOrdering Information Description82C55A Pin Description Functional DiagramGroup a and Group B Controls 82C55A Functional DescriptionData Bus Buffer Read/Write and Control LogicPorts A, B, and C Mode Selection82C55A Operational DescriptionInte Flip-Flop Definition Single Bit Set/Reset Feature FigureOperating Modes Interrupt Control FunctionsMode 0 Basic Output Mode 0 Basic InputMode 0 Configurations Control Word #4 Control Word #8 STB Strobe Input Input Control Signal DefinitionIBF Input Buffer Full F/F Intr Interrupt Request Output Control Signal DefinitionInput Operations Mode 2 Strobed Bi-Directional Bus I/OBi-Directional Bus I/O Control Signal Definition Output OperationsMode Control Word Mode 2 Combinations Current Drive Capability Special Mode Combination ConsiderationsReading Port C Status Figures 15 Applications of the 82C55A