Diamond Systems 16-Channel 12-Bit Analog Output PC/104 Module, RUBY-MM-1612 Mode 0 Basic Input

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82C55A

Mode 0 (Basic Input)

RD

tRR

tIR

tHR

INPUT

tAR

tRA

CS, A1, A0

D7-D0

tRD

tDF

Mode 0 (Basic Output)

WR

tWW

tDW

tWD

D7-D0

tAW

tWA

CS, A1, A0

OUTPUT

tWB

Mode 0 Conﬁgurations

CONTROL WORD #0

CONTROL WORD #2

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

1

0

0

0

0

0

0

0

1

0

0

0

0

0

1

0

A

8

A

8

PA7 - PA0

PA7 - PA0

82C55A

4

82C55A

4

PC7 - PC4

PC7 - PC4

D7 - D0

C

4

D7 - D0

C

4

PC3 - PC0

PC3 - PC0

B

8

B

8

PB7 - PB0

PB7 - PB0

CONTROL WORD #1

CONTROL WORD #3

D7

D6

D5

D4

D3

D2

D1

D0

D7

D6

D5

D4

D3

D2

D1

D0

1

0

0

0

0

0

0

1

1

0

0

0

0

0

1

1

A

8

A

8

PA7 - PA0

PA7 - PA0

82C55A

4

82C55A

4

PC7 - PC4

PC7 - PC4

D7 - D0

C

4

D7 - D0

C

4

PC3 - PC0

PC3 - PC0

B

8

B

8

PB7 - PB0

PB7 - PB0

6

Image 25

Contents

RUBY-MM-1612 Table of Contents Description O Header Pinout Signal Name DefinitionBase Address Configuration Header J5 Position Hex Decimal Board ConfigurationBase Address Adjustable Reference Voltage Analog Output Range ConfigurationOn-Board Reference Full-Scale Voltage Selection Full-Scale VoltageAnalog Output Configuration Header J4 Range RUBY-MM-1612 Board Drawing Ruby-MM-1612 I/O Map Reset informationBase + Write Function Read Function Register Definitions Base + 0 or 1, Read Update DACsBase + 0, Write DAC LSB register Base + 1, Write DAC MSB registerBase + 3, Write External trigger register 82C55 Digital I/O Chip Operation Configuration Register82C55 Register Map DefinitionsFull 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 SpecificationsOrdering Information FeaturesDescription Pinouts82C55A Pin Description Functional DiagramData Bus Buffer 82C55A Functional DescriptionRead/Write and Control Logic Group a and Group B Controls82C55A Mode SelectionOperational Description Ports A, B, and COperating Modes Single Bit Set/Reset Feature FigureInterrupt Control Functions Inte Flip-Flop DeﬁnitionMode 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 DeﬁnitionBi-Directional Bus I/O Control Signal Deﬁnition Mode 2 Strobed Bi-Directional Bus I/OOutput Operations Input OperationsMode Control Word Mode 2 Combinations Current Drive Capability Special Mode Combination ConsiderationsReading Port C Status Figures 15 Applications of the 82C55A