X9250_06 Datasheet, PDF(8/20 Page) Intersil Corporation – Quad Digitally Controlled Potentiometers

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X9250_06 Datasheet, PDF (8/20 Pages) Intersil Corporation – Quad Digitally Controlled Potentiometers

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Figure 8. Increment/Decrement Timing Limits

X9250

SCK

tWRID

VW/RW

Voltage Out

INC/DEC CMD Issued

Table 1. Instruction Set

Instruction Set

Instruction

I3 I2 I1 I0 R1 R0 P1 P0

Operation

Read Wiper Counter

1 0 0 1 0 0 P1 P0 Read the contents of the Wiper Counter

Write Wiper Counter

1 0 1 0 0 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 1 0 1 R1 R0 P1 P0 Transfer the contents of the Data Register

pointed to by R1- R0 to the Wiper Counter

XFR Wiper Counter

1 1 1 0 R1 R0 P1 P0 Transfer the contents of the Wiper Counter

pointed to by R1- R0

Global XFR Data Register 0 0 0 1 R1 R0 0

to Wiper Counter Register

0 Transfer the contents of the Data Registers

pointed to by R1- R0 of all four pots to their

respective Wiper Counter Register

Global XFR Wiper Counter 1 0 0 0 R1 R0 0

0 Transfer the contents of all Wiper Counter

Registers to their respective data Registers

pointed to by R1- R0 of all four pots

Increment/Decrement

Wiper Counter Register

0 0 1 0 0 0 P1 P0 Enable Increment/decrement of the Wiper

Counter Register pointed to by P1- P0

Read Status (WIP bit)

0 1 0 1 0 0 0 1 Read the status of the internal write cycle, by

checking the WIP bit.

FN8165.3

August 29, 2006

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