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X9418WP24-2.7 Datasheet(PDF) 5 Page - Xicor Inc. |
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X9418WP24-2.7 Datasheet(HTML) 5 Page - Xicor Inc. |
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5 / 21 page  X9418 Characteristics subject to change without notice. 5 of 21 REV 1.1.5 7/23/02 www.xicor.com Figure 3. Two-Byte Instruction Sequence S T A R T 0101 A3 A2 A1 A0 A C K I3 I2 I1 I0 R1 R0 0 P0 A C K SCL SDA S T O P The Increment/Decrement command is different from the other commands. Once the command is issued and the X9418 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 Instruction Instruction Set Operation I3 I2 I1 I0 R1 R0 P1 P0 Read Wiper Counter Register 1 0 0 1 0 0 0 1/0 Read the contents of the Wiper Counter Register pointed to by P0 Write Wiper Counter Register 1 0 1 0 0 0 0 1/0 Write new value to the Wiper Counter Register pointed to by P0 Read Data Register 1 0 1 1 1/0 1/0 0 1/0 Read the contents of the Data Register pointed to by P0 and R1–R0 Write Data Register 1 1 0 0 1/0 1/0 0 1/0 Write new value to the Data Register pointed to by P0 and R1–R0 XFR Data Register to Wiper Counter Register 1 1 0 1 1/0 1/0 0 1/0 Transfer the contents of the Data Register pointed to by P0 and R1–R0 to its associated Wiper Counter Register XFR Wiper Counter Register to Data Register 1 1 1 0 1/0 1/0 0 1/0 Transfer the contents of the Wiper Counter Register pointed to by P0 to the Data Register pointed to by R1–R0 Global XFR Data Registers to Wiper Counter Registers 0 0 0 1 1/0 1/0 0 0 Transfer the contents of the Data Registers pointed to by R1–R0 of both pots to their respective Wiper Counter Registers Global XFR Wiper Counter Registers to Data Register 1 0 0 0 1/0 1/0 0 0 Transfer the contents of both Wiper Counter Registers to their respective data Registers pointed to by R1–R0 of both pots Increment/Decrement Wiper Counter Register 0 0 1 0 0 0 0 1/0 Enable Increment/decrement of the Wiper Counter Register pointed to by P0 |
Similar Part No. - X9418WP24-2.7 |
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Similar Description - X9418WP24-2.7 |
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