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X93256 Datasheet(PDF) 2 Page - Intersil Corporation |
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X93256 Datasheet(HTML) 2 Page - Intersil Corporation |
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2 / 7 page  2 FN8188.2 February 1, 2008 Block Diagram 5-BIT UP/DOWN COUNTER 5-BIT NONVOLATILE MEMORY STORE AND RECALL CONTROL CIRCUITRY ONE OF DECODER RESISTOR ARRAY RH1 U/D1 INC1 CS1 TRANSFER GATES THIRTY VCC VSS RL1 GENERAL DESCRIPTION DETAILED SINGLE POTENTIOMETER DESCRIPTION 0 1 2 28 29 30 31 TWO CONTROL AND MEMORY UP/DOWN (U/D1 AND U/D2) INCREMENT (INC1 AND INC2) DEVICE SELECT (CS1 AND CS2) VCC (SUPPLY VOLTAGE) VSS (GROUND) RH1 RL1 30k RH2 RL2 RW RW1 RW2 Pin Descriptions TSSOP SYMBOL BRIEF DESCRIPTION 1RW1 RW1. The RW1 pin of the X93256 is the wiper terminal of the first potentiometer, which is equivalent to the movable terminal of a mechanical potentiometer. 2RL1 RL1. The RH1 and RL1 pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH1 and RL1 references the relative position of the terminal in relation to wiper movement direction selected by the U/D input. 3CS1 Chip Select 1 (CS1). The first potentiometer is selected when the CS1 input is LOW. The current counter value is stored in nonvolatile memory when CS1 is returned HIGH while the INC1 input is also HIGH. After the store operation is complete, the first potentiometer of the X93256 will be placed in the low power standby mode until the first potentiometer is selected once again. 4INC2 Increment 2 (INC2). The INC2 input is negative-edge triggered. Toggling INC2 will move the wiper of the second potentiometer and either increment or decrement the counter in the direction indicated by the logic level on the U/D2 input. 5U/D2 Up/Down 2 (U/D2). The U/D2 input controls the direction of the second potentiometer wiper movement and whether the counter for the second potentiometer is incremented or decremented. 6RH2 RH2. The RH2 and RL2 pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH2 and RL2 references the relative position of the wiper terminal for the second potentiometer in relation to the wiper movement direction selected by the U/D2 input. 7VSS Ground. 8RW2 RW2. The RW2 pin of the X93256 is the wiper terminal of the second potentiometer, which is equivalent to the movable terminal of a mechanical potentiometer. 9RL2 RL2. The RH2 and RL2 pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH2 and RL2 references the relative position of the wiper terminal for the second potentiometer in relation to the wiper movement direction selected by the U/D2 input. 10 CS2 Chip Select 2 (CS2). The second potentiometer is selected when the CS2 input is LOW. The current counter value is stored in nonvolatile memory when CS2 is returned HIGH while the INC2 input is also HIGH. After the store operation is complete, the second potentiometer of the X93256 will be placed in the low power standby mode until the second potentiometer is selected once again. 11 VCC Supply Voltage. 12 INC1 Increment 1(INC1). The INC1 input is negative-edge triggered. Toggling INC1 will move the wiper of the first potentiometer and either increment or decrement the counter in the direction indicated by the logic level on the U/D1 input. 13 U/D1 Up/Down 1 (U/D1). The U/D1 input controls the direction of the first potentiometer wiper movement and whether the counter for the first potentiometer is incremented or decremented. 14 RH1 RH1. The RH1 and RL1 pins of the X93256 are equivalent to the fixed terminals of a mechanical potentiometer. The minimum voltage is VSS and the maximum is VCC. The terminology of RH1 and RL1 references the relative position of the wiper terminal for the first potentiometer in relation to the wiper movement direction selected by the U/D1 input. X93256 |
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