TSC2004 datasheet(46/62 Pages) TI2

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COORDINATE

OH2

OSC

) tPRE)tSNS)

DLY2

OSC

)N @ (B)2) @

OSC

ADC

)OHCONV @

OSC

)

PPRO

OSC

(9)

NOTE:(1)Optional.Ifnotturnedon,itwillbeturnedonbytheScanmode,oncedetected.

Detecting

Touch

PINTDAV Programmed:

CFR2,D[15:14]=10

PENIRQ

CFR2,D[15:14]=11or01

DAV

and

CFR2D[15:14]=00

PENIRQ

DAV

Programmed

for

Host-Controlled

Mode

(PSM=0)

TSC

Not

Addressed

Scan

Mode

Reading

Z -Data

WaitingforHosttoWrite

IntoControlByte1D[6:3]

TouchisDetected

Reading

Z -Data

TSC

NotAddressed

TSC

NotAddressed

Detecting

Touch

WaitingforHosttoWrite

IntoControlByte1D[6:3]

TouchisDetected

COORDINATE

TurnOn

Y+

and

Drivers

(1)

Programmedfor:

Sample,Conversion,

andPreprocessing

forZ Coordinate

Sample,Conversion,

andPreprocessing

forZ Coordinate

COORDINATE

OH2

OSC

) tPVS)tPRE)tSNS)

DLY1

OSC

)N @ (B)2) @

OSC

ADC

)OHCONV @

OSC

)

PPRO

OSC

(10)

Detecting

Touch

PINTDAV Programmed:

CFR2,D[15:14]=10

PENIRQ

CFR2,D[15:14]=11or01

DAV

and

CFR2D[15:14]=00

PENIRQ

DAV

Programmedfor

Host-Controlled

Mode

(PSM=0)

TSC

NotAddressed

P ogra

mm d

for

Z -Z

ScanMode

Reading

Z -Data

WaitingforHosttoWrite

IntoControlByte1D[6:3]

Sample,Conversion,and

PreprocessingforZ ,Z Coordinates

TouchisStillHere

Reading

Z -Data

TSC

NotAddressed

TSC

NotAddressed

Detecting

Touch

WaitingforHosttoWrite

IntoControlByte1D[6:3]

TouchisDetected

COORDINATE

TSC2004

SBAS408E – JUNE 2007 – REVISED MARCH 2008

The time needed to convert any Z1 and Z2 coordinate under host control (not including the time needed to send

the command over the I2C bus) is given by:

Figure 43. Example of Z1 and Z2 Coordinate Touch Screen Scan

(without Panel Stabilization Time) using TSMode 3

If the drivers are not turned on before the touch screen scan mode is programmed, the panel stabilization time

should be included. In this case, the time needed to convert any single X or Y under host control (not including

the time needed to send the command over the I2C bus) is given by:

Figure 44. Example of a Z1 and Z2 Coordinate Touch Screen Scan

(with Panel Stabilization Time) using TSMode 3

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