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X9261US24 Datasheet(PDF) 3 Page - Intersil Corporation |
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X9261US24 Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 20 page 3 FN8171.4 October 12, 2006 SYSTEM LEVEL APPLICATIONS • Adjust the contrast in LCD displays • Control the power level of LED transmitters in communication systems • Set and regulate the DC biasing point in an RF power amplifier in wireless systems • Control the gain in audio and home entertainment systems • Provide the variable DC bias for tuners in RF wire- less systems • Set the operating points in temperature control systems • Control the operating point for sensors in industrial systems • Trim offset and gain errors in artificial intelligent systems PIN CONFIGURATION PIN ASSIGNMENTS PIN DESCRIPTIONS Bus Interface Pins SERIAL OUTPUT (SO) SO is a serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial clock. SERIAL INPUT SI is the serial data input pin. All opcodes, byte addresses and data to be written to the pots and pot registers are input on this pin. Data is latched by the rising edge of the serial clock. SERIAL CLOCK (SCK) The SCK input is used to clock data into and out of the X9261. SO A0 NC NC VCC RL0 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 HOLD SCK NC NC NC NC VSS RW1 RH1 RL1 SOIC/TSSOP X9261 NC 14 13 11 12 NC RH0 RW0 CS A1 SI WP Pin (SOIC/ TSSOP) Symbol Function 1 SO Serial Data Output for SPI bus 2 A0 Device Address for SPI bus. 3 NC No Connect. 4 NC No Connect. 5 NC No Connect. 6 NC No Connect. 7VCC System Supply Voltage 8RL0 Low Terminal for Potentiometer 0. 9RH0 High Terminal for Potentiometer 0. 10 RW0 Wiper Terminal for Potentiometer 0. 11 CS Device Address for SPI bus. 12 WP Hardware Write Protect 13 SI Serial Data Input for SPI bus 14 A1 Device Address for SPI bus. 15 RL1 Low Terminal for Potentiometer 1. 16 RH1 High Terminal for Potentiometer 1. 17 RW1 Wiper Terminal for Potentiometer 1. 18 VSS System Ground 19 NC No Connect 20 NC No Connect 21 NC No Connect 22 NC No Connect 23 SCK Serial Clock for SPI bus 24 HOLD Device select. Pause the SPI serial bus. X9261 |
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