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MCP4728 датащи(PDF) 36 Page - Microchip Technology |
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MCP4728 датащи(HTML) 36 Page - Microchip Technology |
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36 / 50 page ![]() MCP4728 Evaluation Board User’s Guide DS51837A-page 32 © 2009 Microchip Technology Inc. 1.3.2.16 EXAMPLE 9: WRITE POWER-DOWN SELECTION BITS IN DAC INPUT REGISTER This command writes power-down bits to the DAC input registers. Figure 1-22 shows an example of writing a new script file for Power-Down mode. . FIGURE 1-22: Writing Script file to write the power-down bits. The channel outputs are updated immediately with the ACK pulse. This command does not require UDAC bit or LDAC pin change. • Parameters in the Script Detail column: 1. To change value: • Click this box and type a new value 2. To delete or Insert box: • Select the box and right click the mouse button for options available 3. Make sure the listed parameters in “script Detail” are in the exact order as shown here. Script Detail I2CSTART * I2CWRTBYT * 03 -------> This means there are three bytes to send. C0 -------> Address byte = 1100-0000 (See Note). AF -------> Command Type and Power-Down bits for Chs. A and B. FF -------> Power-Down bits for Channels C and D. I2CSTOP * Note: All parameters above must be listed in order. The parameter above with * are not modifiable. The MCP4728 device on the evaluation board has I2C address bits (A2, A1, A0) = (0,0,0). |
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