DM6210 datasheet(6/91 Pages) ETC

6 / 91 page

BA + 10: 8254 Timer/Counter 2 (Read/Write 8-bit) ....................................................................................4-6

BA + 11: 8254 Control Word (Write Only 8-bit) .........................................................................................4-6

BA + 12: Digital I/O Port 0 (Read/Write 8-bit) ............................................................................................4-7

BA + 13: Digital I/O Port 1 (Read/Write 8-bit) ............................................................................................4-7

BA + 14: Digital I/O Strobe Select (Read/Write 8-bit) ................................................................................4-7

BA + 15: Digital I/O Control (Read/Write 8-bit) ..........................................................................................4-8

Programming the DM6210 ..................................................................................................................................4-9

Clearing and Setting Bits in a Port ..................................................................................................................4-9

CHAPTER 5 A/D CONVERSIONS ................................................................................................. 5-1

Selecting a Channel ..........................................................................................................................................5-3

Starting an A/D Conversion ............................................................................................................................5-3

Monitoring Conversion Status ........................................................................................................................5-3

Reading the Converted Data ...........................................................................................................................5-4

Channel Scanning ............................................................................................................................................5-5

CHAPTER 6 INTERRUPTS ............................................................................................................ 6-1

Software Selectable Interrupt Sources ...........................................................................................................6-3

Software Selectable Interrupt Channel ...........................................................................................................6-3

Basic Programming For Interrupt Handling ..................................................................................................6-4

What Is an Interrupt? ...................................................................................................................................6-4

Interrupt Request Lines ...............................................................................................................................6-4

8259 Programmable Interrupt Controller ..................................................................................................6-4

Interrupt Mask Register (IMR) ...................................................................................................................6-4

End-of-Interrupt (EOI) Command ..............................................................................................................6-5

What Exactly Happens When an Interrupt Occurs? ................................................................................. 6-5

Using Interrupts in Your Programs ............................................................................................................6-5

Writing an Interrupt Service Routine (ISR) ...............................................................................................6-5

Saving the Startup Interrupt Mask Register (IMR) and Interrupt Vector ...............................................6-6

Restoring the Startup IMR and Interrupt Vector .......................................................................................6-7

Common Interrupt Mistakes .......................................................................................................................6-7

CHAPTER 7 TIMER / COUNTERS ............................................................................................... 7-1

CHAPTER 8 DIGITAL I/O .............................................................................................................. 8-1

BA + 12: Digital I/O Port 0 (Read/Write 8-bit) .................................................................................................8-3

BA + 13: Digital I/O Port 1 (Read/Write 8-bit) .................................................................................................8-3

BA + 14: Digital I/O Strobe Select (Read/Write 8-bit).....................................................................................8-3

BA + 15: Digital I/O Control (Read/Write 8-bit) ..............................................................................................8-4

Strobing Data into Port 0 or Port 1 ......................................................................................................................8-4

CHAPTER 9 EXAMPLE PROGRAMS .......................................................................................... 9-1

C Programs ............................................................................................................................................................9-3

Quick Basic Programs ..........................................................................................................................................9-3

CHAPTER 10 CALIBRATION...................................................................................................... 10-1

Required Equipment .......................................................................................................................................... 10-3

A/D Calibration .................................................................................................................................................. 10-4

Unipolar Calibration ..................................................................................................................................... 10-5

Bipolar Calibration........................................................................................................................................ 10-5

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