TS2043

Preliminary

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

8 of 8

www.unisonic.com.tw

QW-R502-404.a

APPLICATION INFORMATION(Cont.)

OPERATION OF 16-CLOCKS

The typical operation of the UTC TS2043 is 24-clocks (three control bytes) per conversion. However the control

bits for the next conversion can be overlapped with current conversion for a faster conversion. Figure 3 shows the

timing of 16-Clocks per conversion.

/CS

DCLK

X/Y

SWITGH

DIN

BUSY

DOUT

(MSB)

(LSB)

0

11

(MSB)

11 10 9

ON

ON

8

1

1

8

1

1

Figure 3. Timing of 16-clocks per Conversion

ANALOG INPUT

There are four channel inputs in the UTC TS2043. X+ and Y+ inputs are for touch panel measurement, 2 auxiliary

inputs are IN3 and IN4. The input to the A/D converter is selected via the four-channel multiplexer. (see Block

Diagram)

Input Channel

The input channel configuration of the UTC TS2043 is shown in Table V. The control bits are set via the DIN pin.

(see Control byte section). The selected channel is for A/D converter input. Please refer to Figure 5 for detailed

input channel multiplexer. For measuring X+ and Y+, Y switches and X switches are turned on respectively.

Reference Input

An external reference voltage source is needed for the UTC TS2043. The reference input sets the Analog-to-Digital

converter (ADC) input range. If the reference input is from the power supply directly, to avoid noise from power

supply, special care must be taken into consideration.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.