8143 Datasheet, PDF (20/24 Pages) Maxwell Technologies – 12-Bit Serial Daisy Chain D/A Converter

12-Bit Serial Daisy-Chain D/A Converter
FIGURE 21. MC6800 INTERFACE
8143
Interface to the 8085
The 8143’s interface to the 8085 microprocessor is shown in Figure 22. Note that the microprocessor’s SOD line is
used to present data serially to the DAC.
Data is strobed into the 8143 by executing memory write instructions. The strobe 2 input is generated by decoding an
address location and WR. Data is loaded into the DAC register with a memory write instruction to another address
location.
Serial data supplied to the 8143 must be present in the right-justified format in registers H and L of the microprocessor.
FIGURE 22. 8085 INTERFACE
Interface to the 68000
Figure 23 shows the 8143 configured to the 68000 microprocessor. Serial data input is similar to that of the 6800 in
Figure 21.
07.23.03 REV 3
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