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AD8108-EB Datasheet(PDF) 8 Page - Analog Devices |
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AD8108-EB Datasheet(HTML) 8 Page - Analog Devices |
8 / 33 page AD8108/AD8109 Rev. B | Page 7 of 32 Table 6. Operation Truth Table CE UPDATE CLK DATA IN DATA OUT RESET SER/ PAR Operation/Comment 1 X X X X X X No change in logic. 0 1 f Datai Datai-32 1 0 The data on the serial DATA IN line is loaded into serial register. The first bit clocked into the serial register appears at DATA OUT 32 clocks later. 0 1 f D0 … D3, A0 … A2 NA in parallel mode 1 1 The data on the parallel data lines, D0 to D3, are loaded into the 32-bit serial shift register location addressed by A0 to A2. 0 0 X X… X 1 X Data in the 32-bit shift register transfers into the parallel latches that control the switch array. Latches are transparent. X X X X X 0 X Asynchronous operation. All outputs are disabled. Remainder of logic is unchanged. D CLK Q S D1 Q D0 A0 A1 A2 CLK CE RESET D LE OUT0 EN Q CLR 8 64 DATA IN (SERIAL) (OUTPUT ENABLE) SER/PAR OUT0 EN DATA OUT PARALLEL DATA DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 D0 D1 D2 D3 DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 DQ CLK S D1 Q D0 D Q CLK S D1 Q D0 OUT1 EN OUT2 EN OUT3 EN OUT4 EN OUT5 EN OUT6 EN OUT7 EN D LE OUT0 B2 Q D LE OUT0 B1 Q D LE OUT0 B0 Q D LE OUT1 B0 Q D LE OUT6 EN Q CLR D LE OUT7 B0 Q D LE OUT7 B1 Q D LE OUT7 B2 Q D LE OUT7 EN Q CLR DECODE OUTPUT ENABLE SWITCH MATRIX Figure 4. Logic Diagram |
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