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X9410 Datasheet(PDF) 3 Page - Intersil Corporation |
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X9410 Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 21 page 3 FN8193.2 October 12, 2006 Potentiometer Pins VH/RH (VH0/RH0 - VH1/RH1), VL/RL (VL0/RL0 - VL1/RL1) The VH/RH and VL/RL inputs are equivalent to the terminal connections on either end of a mechanical potentiometer. VW/RW (VW0/RW0 - VW1/RW1) The wiper outputs are equivalent to the wiper output of a mechanical potentiometer. Hardware Write Protect Input (WP) The WP pin when LOW prevents nonvolatile writes to the Data Registers. Analog Supplies (V+, V-) The analog supplies V+, V- are the supply voltages for the XDCP analog section. PIN CONFIGURATION PIN NAMES DEVICE DESCRIPTION The X9410 is a highly integrated microcircuit incorporating two resistor arrays and their associated registers and counters and the serial interface logic providing direct communication between the host and the XDCP potentiometers. Serial Interface The X9410 supports the SPI interface hardware conventions. The device is accessed via the SI input with data clocked in on the rising SCK. CS must be LOW and the HOLD and WP pins must be HIGH during the entire operation. The SO and SI pins can be connected together, since they have three state outputs. This can help to reduce system pin count. Array Description The X9410 is comprised of two resistor arrays. Each array contains 63 discrete resistive segments that are connected in series. The physical ends of each array are equivalent to the fixed terminals of a mechanical potentiometer (VH/RH and VL/RL inputs). At both ends of each array and between each resistor segment is a CMOS switch connected to the wiper (VW/RW) output. Within each individual array only one switch may be turned on at a time. These switches are controlled by a Wiper Counter Register (WCR). The six bits of the WCR are decoded to select, and enable, one of sixty-four switches. VCC VL0/RL0 VH0/RH0 WP SI A1 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 V+ A0 SO HOLD SCK DIP/SOIC X9410 VSS VW0/RW0 14 13 11 12 CS VL1/RL1 VH1/RH1 VW1/RW1 V- SI A1 VL1/RL1 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 WP CS VW0/RW0 VH0/RH0 VL0/RL0 VCC TSSOP X9410 HOLD VH1/RH1 14 13 11 12 VW1/RW1 SCK A0 SO VSS NC NC NC NC NC NC NC NC NC V+ V- NC NC NC Symbol Description SCK Serial Clock SI, SO Serial Data A0 - A1 Device Address VH0/RH0 - VH1/RH1, VL0/RL0 - VL1/RL1 Potentiometer Pins (terminal equivalent) VW0/RW0 - VW1/RW1 Potentiometer Pin (wiper equivalent) WP Hardware Write Protection V+,V- Analog Supplies VCC System Supply Voltage VSS System Ground NC No Connection X9410 |
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