a. Interface Converters A / D
Converters A / D is used to facilitate the microcontroller interface with 1:31 showing analog.Gambar signal converter interface A / D type converter AD571 with mikrokontroler.AD571 is A / D eight-bit. As can be seen ari, that the output data and control of the converter A / D is connected pin I / O microcontroller. Microcontroller send commands like start conversion, choose kanalinput if the converter A / D input channels have more dri one and others.
Microcontroller also sensing signal from the converter A / D as the end of konversiutnuk storing digital bits. In this case, the microcontroller megirim LOW signal on the line BLANK / DR untu begin the conversion process, and then wait for the data ready signal (DR) becomes LOW. Then bit digital output received by icrocontroller and processed in accordance with a program created earlier.
Figure 33 Interface converters A / D to microcontroller
b. Interface Converters D / A
When the interface is a converter D / A diberkan to microcontrollers, data lines and control lines, such as the start of conversion and the lines chose chips (chip select) dihubungkakan to pin microcontroller. Software generates a signal that is needed to begin the conversion process. 1:32 image shows the interface converter D / A type of DAC 809 with a microcontroller. DAC-809 is a Modifier Bit D / A eight bits. Here, the output is in the form of current output, premises so if you want the output is voltage, it is necessary current to voltage converter at its output
Figure 34 Interface converter D / A with microcontrollers