TSC2102IDA datasheet(35/58 Pages) TI2

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TSC2102

SLAS379A− APRIL 2003 − REVISED JUNE 2004

www.ti.com

BIT

FUNCTION

RESET

VALUE

READ/

WRITE

NAME

RPWDN

R/W

Reference Power Down. This bit controls the power down of the internal reference voltage.

0 => Powered up at all times.

1 => Powered down between conversions.

Note: when D4 = 0, i.e. device is in external reference mode, then the internal reference is powered

down always

IREFV

R/W

Internal Reference Voltage. This bit selects the internal voltage reference level for the TSC ADC.

0 => VREF = 1.25 V

1 => VREF = 2.50 V

BIT

NAME

READ/

WRITE

RESET

VALUE

FUNCTION

D15−D0

RSALL

R/W

FFFFH

Reset All. Writing the code 0xBB00, as shown below, to this register causes the TSC2102 to reset

all its registers to their default, power−up values.

1011101100000000 => Reset all registers

Others

=> Do not write other sequences to this register.

BIT

NAME

READ/

WRITE

RESET

VALUE

FUNCTION

D15−D6

000H

Reserved. Write only zeros to these bits.

D5−D3

PRECTM

R/W

000

Precharge Time. These bits set the amount of time allowed for precharging any pin capacitance on

the touch screen prior to sensing if a screen touch is happening.

000 =>

µs

001 =>

µs

010 => 276

µs

011 => 340

µs

100 => 1.044 ms

101 => 1.108 ms

110 => 1.300 ms

111 => 1.364 ms

D2−D0

RPWUDL

R/W

000

Sense Time. These bits set the amount of time the TSC2102 waits to sense whether the screen is

being touched, when converting a coordinate value.

000 =>

µs

001 =>

µs

010 => 544

µs

011 => 608

µs

100 => 2.080 ms

101 => 2.144 ms

110 => 2.592 ms

111 => 2.656 ms

TSC2102IDA Datasheet(PDF) 35 Page - Texas Instruments

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