TSC2102IDA datasheet(32/54 Pages) TI

32 / 54 page

TSC2102

SLAS379A− APRIL 2003 − REVISED JUNE 2004

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BIT

FUNCTION

RESET VALUE

READ/

WRITE

NAME

D13−10

ADSCM

R/W

0000

A/D Scan Mode.

0000 => No scan

0001 => Touch screen scan function: X and Y coordinates are converted and the results

returned to X and Y data registers. Scan continues until either the pen is lifted

or a stop bit is sent.

0010 => Touch screen scan function: X, Y, Z1 and Z2 coordinates are converted and the

results returned to X, Y, Z1 and Z2 data registers. Scan continues until either

the pen is lifted or a stop bit is sent.

0011 => Touch screen scan function: X coordinate is converted and the results returned

to X data register.

0100 => Touch screen scan function: Y coordinate is converted and the results returned

to Y data register.

0101 => Touch screen scan function: Z1 and Z2 coordinates are converted and the results

returned to Z1 and Z2 data registers.

0110 => BAT1 input is converted and the result is returned to the BAT1 data register.

0111 => BAT2 input is converted and the result is returned to the BAT2 data register.

1000 => AUX input is converted and the result is returned to the AUX data register.

1001 => Scan function :AUX input is converted and the result is returned to the AUX data

1010 => TEMP1 is converted and the result is returned to the TEMP1 data register.

1011 => Port scan function: BAT1, BAT2 and AUX inputs are measured and the results

returned to the appropriate data registers.

1100 => TEMP2 is converted and the result is returned to the TEMP2 data register.

1101 => Turn on X+, X− drivers

1110 => Turn on Y+, Y− drivers

1111 => Turn on Y+, X− drivers

D9−D8

RESOL

R/W

Resolution Control. The A/D converter resolution is specified with these bits.

00 => 12−bit resolution

01 => 8−bit resolution

10 => 10−bit resolution

11 => 12−bit resolution

D7−D6

ADAVG

R/W

Converter Averaging Control. These two bits allow you to specify the number of averages

the converter performs selected by bit D0, which selects either mean filter or

median filter.

Mean Filter

Median filter

00 =>

No average

01 =>

4−data average

5-data average

10 =>

8−data average

9-data average

11 =>

16−data average

15-data average

D5−D4

ADCR

R/W

Conversion Rate Control. These two bits specify the internal clock rate which the A/D

converter uses to perform a single conversion. These bits are the same

whether reading or writing.

tconv +

) 4

INTCLK

where fINTCLK is the internal clock frequency. For example, with 12-bit resolution and a

2-MHz internal clock frequency, the conversion time is 8.0

µs. This yields an effective

throughput rate of 125 kHz.

00 => 8-MHz internal clock rate (use for 8-bit resolution only)

01 => 4-MHz internal clock rate (use for 8-bit/10-bit resolution only)

10 => 2-MHz internal clock rate

11 => 1-MHz internal clock rate

TSC2102IDA Datasheet(PDF) 32 Page - Texas Instruments

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