TSC2102 datasheet(46/58 Pages) TI2

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TSC2102

SLAS379A− APRIL 2003 − REVISED JUNE 2004

www.ti.com

Programmed

for Host

Controlled

Mode

Detecting Touch

Sample,Conversion &

Averaging for

Y−Coordinate

Reading

X−Data

Reading

Y−Data

Detecting

Touch

Sample,Conversion &

Averaging for

X−Coordinate

Detecting

Touch

Sample,Conversion &

Averaging for

Y−Coordinate

Detecting

Touch

Touch Is Detected

REG−00 of

PAGE−01

Is Updated

for

X−Y Scan

Mode

Waiting for Host to

Write into REG−00 of

PAGE−01

SS DEACTIVATED

(As PENIRQ

[D15−D14 = 00])

PINTDAV

(As PENIRQ & DATA_AVA

[D15−D14 = 10/11])

PINTDAV

Touch Is Detected

(As DATA_AVA

[D15−D14 = 01])

PINTDAV

Non-Touch Screen Measurement Operation

The time needed to make temperature, auxiliary, or battery measurements is given by:

+ N

AVG

BITS )

8MHz

ƒconv

) n

1 )

2 )

OSC )

OSC

where:

n1 = 6 ; if ƒconv = 8 MHz

7 ; if

ƒconv ≠ 8 MHz

n2 = 24 ; if measurement is for TEMP1 case

12 ; if measurement is for other than TEMP1 case

n3 = 0 ; if external reference mode is selected

3 ; if tREF = 0 µs or reference is programmed for power up all the time.

1 + tREF /125 ns; if tREF ≠ 0 µs and reference needs to power down between conversions.

tREF is the reference power up delay time.

Programmed for

Host Controlled

Mode With Invalid

A/D Function

Selected

Detecting Touch

Sample,Conversion &

Averaging for

BAT1 input

Reading

BAT1−Data

Waiting for Host to Write

into REG−00 of PAGE−01

Waiting for Host to

Write into REG−00

of PAGE−01

REG−00 of

PAGE−01

Is Updated

for

BAT1 Scan

Mode

Wait for Reference Power-Up Delay in Case

of Internal Ref Mode if Applicable

(As DATA_AVA

[D15−D14 = 01])

PINTDAV

SS DEACTIVATED

The time needed for continuous AUX conversion in scan mode is given by:

+ N

AVG

BITS )

8MHz

ƒconv

) n

1 )

) 1

OSC )

OSC

where:

n1 = 6 ; if ƒconv = 8 MHz

7 ; if

ƒconv ≠ 8 MHz

NOTE: The above equation is valid only from second conversion onwards.

TSC2102 Datasheet(PDF) 46 Page - Texas Instruments

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