8080_8224_8228_Polled_interface_for_A_D_converter

Published:2009/7/23 20:54:00 Author:Jessie | From:SeekIC

This circuit shows a polled interface for the ADC0808/0809.where the address is partially decoded by a DM74LS139, which creates the read and write strobes to operate the ADC. The circuit can be connected in an interrupt mode using resettable latches (as shown in the dashed lines of Fig. 6-20). Figure 6-23B shows typical polled routines.



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