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X9313USM Datasheet(PDF) 5 Page - Intersil Corporation |
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X9313USM Datasheet(HTML) 5 Page - Intersil Corporation |
5 / 11 page 5 FN8177.2 September 9, 2005 The system may select the X9313, 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 described above 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 recalled 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. Symbol Table TABLE 2. MODE SELECTION CS INC U/D MODE L H Wiper up L L Wiper down H X Store wiper position H X X Standby current L X No store, return to standby L H Wiper up (not recommended) L L Wiper down (not recommended) WAVEFORM INPUTS OUTPUTS Must be steady Will be steady May change from Low to High Will change from Low to High May change from High to Low Will change from High to Low Don’t Care: Changes Allowed Changing: State Not Known N/A Center Line is High Impedance X9313 |
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