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X9400WV24Z Datasheet(PDF) 3 Page - Intersil Corporation |
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X9400WV24Z Datasheet(HTML) 3 Page - Intersil Corporation |
3 / 20 page 3 FN8189.4 September 2, 2015 PIN DESCRIPTIONS Host Interface Pins Serial Output (SO) SO is a push/pull 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 X9400. Chip Select (CS) When CS is HIGH, the X9400 is deselected and the SO pin is at high impedance, and (unless an internal write cycle is underway) the device will be in the standby state. CS LOW enables the X9400, placing it in the active power mode. It should be noted that after a power-up, a HIGH to LOW transition on CS is required prior to the start of any operation. Hold (HOLD) HOLD is used in conjunction with the CS pin to select the device. Once the part is selected and a serial sequence is underway, HOLD may be used to pause the serial communication with the controller without resetting the serial sequence. To pause, HOLD must be brought LOW while SCK is LOW. To resume communication, HOLD is brought HIGH, again while SCK is LOW. If the pause feature is not used, HOLD should be held HIGH at all times. Device Address (A0 - A1) The address inputs are used to set the least significant 2 bits of the 8-bit slave address. A match in the slave address serial data stream must be made with the address input in order to initiate communication with the X9400. A maximum of 4 devices may occupy the SPI serial bus. Potentiometer Pins VH/RH (VH0/RH0 - VH3/RH3), VL/RL (VL0/RL0 - VL3/RL3) The VH/RH and VL/RL inputs are equivalent to the terminal connections on either end of a mechanical potentiometer. VW/RW (VW0/RW0 - VW3/RW3) 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 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+ VL3/RL3 VH3/RH3 VW3/RW3 A0 SO HOLD SCK VL2/RL2 VH2/RH2 SOIC X9400 V SS VW0/RW0 14 13 11 12 CS VL1/RL1 VH1/RH1 VW1/RW1 VW2/RW2 V- SI A1 VH2/RH2 1 2 3 4 5 6 7 8 9 10 24 23 22 21 20 19 18 17 16 15 WP CS VW0/RW0 VCC V+ VL3/RL3 VH3/RH3 VW3/RW3 TSSOP X9400 VW2/RW2 14 13 11 12 HOLD VL1/RL1 VH1/RH1 VW1/RW1 A0 SO VH0/RH0 V- SCK VL2/RL2 VL0/RL0 VSS X9400 |
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