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X9317UV8IZ Datasheet(PDF) 8 Page - Intersil Corporation |
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X9317UV8IZ Datasheet(HTML) 8 Page - Intersil Corporation |
8 / 13 page 8 FN8183.7 March 7, 2012 The system may select the X9317, move the wiper and deselect the device without having to store the latest wiper position in nonvolatile memory. After the wiper movement is performed as previously described and once the new position is reached, the system must keep INC LOW while taking CS HIGH. The new wiper position will be maintained until changed by the system or until a power-up/down cycle recalls the previously stored data. This procedure allows the system to always power-up to a preset value stored in nonvolatile memory; then during system operation minor adjustments could be made. The adjustments might be based on user preference, system parameter changes due to temperature drift, etc. The state of U/D may be changed while CS remains LOW. This allows the host system to enable the device and then move the wiper up and down until the proper trim is attained. Applications Information Electronic digitally controlled (XDCP) potentiometers provide three powerful application advantages: 1. the variability and reliability of a solid-state potentiometer, 2. the flexibility of computer-based digital controls, and 3. the retentivity of nonvolatile memory used for the storage of multiple potentiometer settings or data. Mode Selection CS INC U/D MODE L H Wiper up L L Wiper down H X Store wiper position to nonvolatile memory H X X Standby L X No store, return to standby L H Wiper Up (not recommended) L L Wiper Down (not recommended) X9317 |
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