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X9409WS24Z-2.7 Datasheet(PDF) 6 Page - Intersil Corporation |
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X9409WS24Z-2.7 Datasheet(HTML) 6 Page - Intersil Corporation |
6 / 20 page 6 FN8192.3 October 19, 2005 Figure 3. Two-Byte Instruction Sequence The Increment/Decrement command is different from the other commands. Once the command is issued and the X9409 has responded with an acknowledge, the master can clock the selected wiper up and/or down in one segment steps; thereby, providing a fine tuning capability to the host. For each SCL clock pulse (tHIGH) while SDA is HIGH, the selected wiper will move one resistor segment towards the VH/RH terminal. Similarly, for each SCL clock pulse while SDA is LOW, the selected wiper will move one resistor segment towards the VL/RL terminal. A detailed illustration of the sequence and timing for this operation are shown in Figures 5 and 6 respectively. Table 1. Instruction Set Note: (7) 1/0 = data is one or zero S T A R T 0101 A3 A2 A1 A0 A C K I3 I2 I1 I0 R1 R0 P1 P0 A C K SCL SDA S T O P Instruction Instruction Set Operation I3 I2 I1 I0 R1 R0 P1 P0 Read Wiper Counter Register 1 0010 0 P1 P0 Read the contents of the Wiper Counter Register pointed to by P1 - P0 Write Wiper Counter Register 1 0100 0 P1 P0 Write new value to the Wiper Counter Register pointed to by P1 - P0 Read Data Register 1 0 1 1 R1 R0 P1 P0 Read the contents of the Data Register pointed to by P1 - P0 and R1 - R0 Write Data Register 1 1 0 0 R1 R0 P1 P0 Write new value to the Data Register pointed to by P1 - P0 and R1 - R0 XFR Data Register to Wiper Counter Register 1 101 R1 R0 P1 P0 Transfer the contents of the Data Register pointed to by P1 - P0 and R1 - R0 to its associated Wiper Counter Register XFR Wiper Counter Register to Data Register 1 110 R1 R0 P1 P0 Transfer the contents of the Wiper Counter Register pointed to by P1 - P0 to the Data Register pointed to by R1 - R0 Global XFR Data Registers to Wiper Counter Registers 0 001 R1 R0 0 0 Transfer the contents of the Data Registers pointed to by R1 - R0 of all four pots to their respective Wiper Counter Registers Global XFR Wiper Counter Registers to Data Register 1 000 R1 R0 0 0 Transfer the contents of both Wiper Counter Registers to their respective Data Registers pointed to by R1 - R0 of all four pots Increment/Decrement Wiper Counter Register 0 0100 0 P1 P0 Enable Increment/decrement of the WCR Latch pointed to by P1 - P0 X9409 |
Similar Part No. - X9409WS24Z-2.7 |
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Similar Description - X9409WS24Z-2.7 |
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