Datasheet

SCLK

DIN

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

C1 C0 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0

SCLK

DIN

1 2

6 7 8

C1 C0 A1 A0

A) 16-clock cycle Data Write Sequence

B) 8-clock cycle Data Move/Copy Sequence

TPL0202

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SLIS135C –DECEMBER 2010–REVISED JUNE 2012

Write-Wiper Register (Command 00)

Data written to the write-wiper registers (C1, C0 = 00) controls the wiper positions. The 8 data bits (D7 to D0)

indicate the position of the wiper. If DIN = 0x00h, the wiper moves to the position closest to the L terminal. If

DIN=0xFFh, the wiper moves to the position closest to the H terminal. This command writes data to the volatile

RAM, leaving the NV registers unchanged. When the device powers up, the data stored in the NV registers

transfers to the volatile wiper register, moving the wiper to the stored position

Write-NV Register (Command 01)

This command (C1, C0 = 01) stores the position of the wipers to the NV registers for use at power-up.

Alternatively, the “copy wiper register to NV register” command can be used to store the position of the wipers to

the NV registers. Writing to the NV registers does not affect the position of the wipers.

Copy Wiper Register to NV Register (Command 10)

This command (C1, C0 = 10) stores the current position of the wiper to the NV register, for use at power-up. This

command may affect one potentiometer at a time, or both simultaneously, depending on the state of A1 and A0.

Alternatively, the “write NV register” command can be used to store the current position of the wiper to the NV

Copy NV Register to Wiper Register (Command 11)

This command (C1, C0 = 11) restores the wiper position to the previously stored position in the NV register. This

command may affect one potentiometer at a time, or both simultaneously, depending on the state of A1 and A0.

Figure 2. Digital Interface Write Sequence

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