Start

Address (1010 _ _ _)

0

Ack

Register Addr

Ack

Start

Address (1010_ _ _)

0

Ack

Register Addr

Ack

reStart

Address (1010_ _ _)

1

Ack

First Read Data Byte

Ack

I

I

From Processor to DPOT

From DPOT to Processor

Data1

Ack

Stop

Last Read Data Byte

noAck

Stop

Ack

Ack

DataN

TPL0102-EP

www.ti.com

SLIS149 – JUNE 2014

8.3 Feature Description

Table 1. Summary of Features

Feature

TPL0102-EP

Number of potentiometers

2

Digital interface

Steps

256

Wiper memory

Non-volatile

Taper

Linear

End-to-end resistance

100 k

Ω

End-to-end resistance tolerance

20%

Wiper resistance

25

Ω (typ)

8.3.1 Potentiometer Pin Description

8.3.1.1 HA, HB, LA, LB

The high (HA, HB) and low (LA, LB) pins of the TPL0102-EP are equivalent to the fixed pins of a mechanical

potentiometer. The H and L pins do not have any polarity restrictions, i.e. H can be at a higher voltage than L, or

L can be at a higher voltage than H. The WA and WB pins are the wipers and equivalent to the movable pin of a

mechanical potentiometer. The position of the wiper is set using the WR register. With the WR register set to 255

decimal, the wiper is closest to the H pin, and with the WR register set to 0, the wiper is closest to the L pin.

8.3.1.2 SDA, SCL

requires an external pull-up resistor.

8.3.1.3 A0, A1, A2

Copyright © 2014, Texas Instruments Incorporated

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