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DAC0832LCN Datasheet(PDF) 10 Page - Texas Instruments |
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DAC0832LCN Datasheet(HTML) 10 Page - Texas Instruments |
10 / 29 page DAC0830, DAC0832 SNAS534B – MAY 1999 – REVISED MARCH 2013 www.ti.com *TIE TO LOGIC 1 IF NOT NEEDED (SEE Double-Buffered Operation). Figure 13. Controlling Mutiple DACs Figure 14. The ILE pin is an active high chip select which can be decoded from the address bus as a qualifier for the normal CS signal generated during a write operation. This can be used to provide a higher degree of decoding unique control signals for a particular DAC, and thereby create a more efficient addressing scheme. Another useful application of the ILE pin of each DAC in a multiple DAC system is to tie these inputs together and use this as a control line that can effectively “freeze” the outputs of all the DAC's at their present value. Pulling this line low latches the input register and prevents new data from being written to the DAC. This can be particularly useful in multiprocessing systems to allow a processor other than the one controlling the DAC's to take over control of the data bus and control lines. If this second system were to use the same addresses as those decoded for DAC control (but for a different purpose) the ILE function would prevent the DAC's from being erroneously altered. In a “Stand-Alone” system the control signals are generated by discrete logic. In this case double-buffering can be controlled by simply taking CS and XFER to a logic “0”, ILE to a logic “1” and pulling WR1 low to load data to the input latch. Pulling WR2 low will then update the analog output. A logic “1” on either of these lines will prevent the changing of the analog output. 10 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: DAC0830 DAC0832 |
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