TSC2101_07 datasheet(78/93 Pages) TI

Part #	TSC2101

Description	AUDIO CODEC WITH INTEGRATED HEADPHONE, SPEAKER AMPLIFIER AND TOUCH SCREEN CONTROLLER

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Manufacturer	TI [Texas Instruments]

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TSC2101

SLAS392D− JUNE 2003 − REVISED MAY 2005

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78

Touch Screen Conversion Initiated by the Host

The time needed to convert any single coordinate either X or Y under host-controlled mode (not including the time

needed to send the command over the SPI bus) is given by:

tcoordinate +

tPVS

125 ns

tOSC ) NAVG NBITS ) 1

8MHz

ƒconv

) n1 ) 12 ) 1

tOSC ) 14 tOSC ) n2 tOSC

n1 = 6 ; if ƒconv = 8 MHz

7 ; if ƒconv ≠ 8 MHz

n2 = 2 ; if tPVS = 0 µs

0 ; if tPVS ≠ 0 µs

Programmed

for Host

Controlled

Mode

Detecting Touch

Sample,Conversion &

Averaging for

X−Coordinate

Reading

X−Data

Register

Touch is still there

Touch is detected

/PINTDAV

(As /PENIRQ

[D15−D14 = 00])

/PINTDAV

(As /DATA_AVA

[D15−D14 = 01])

/PINTDAV

(As /PENIRQ & DATA_AVA

[D15−D14 = 10/11])

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

X Scan

Mode

/SS DEACTIVATED

Detecting

Touch

tcoordinate +

tPVS

125 ns

tOSC ) 2

NAVG NBITS ) 1

8MHz

ƒconv

) n1 ) 12 ) 1

tOSC ) 20 tOSC ) n2 tOSC

n1 = 6 ; if ƒconv = 8 MHz

7 ; if ƒconv ≠ 8 MHz

n2 = 2 ; if tPVS = 0 µs

0 ; if tPVS ≠ 0 µs

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TSC2101 Datasheet(PDF) 78 Page - Texas Instruments

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