Datasheet

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t
COORDINATE
+
OH1
f
OSC
)
ǒ
t
PVS
)t
PRE
)t
SNS
)
OH
DLY1
f
OSC
Ǔ
)N @
ǒ(
B)2
)
@
f
OSC
f
ADC
)OH
CONV
Ǔ
@
ǒ
1
f
OSC
Ǔ
)
ǒ
L
PPRO
f
OSC
Ǔ
(11)
Detecting
Touch
PINTDAV Programmed:
As ,
CFR2,D[15:14]=10
PENIRQ
As ,
CFR2,D[15:14]=11or01
DAV
As and ,
CFR2,D[15:14]=00
PENIRQ DAV
Programmedfor
Host-Controlled
Mode
(PSM=0)
CS
Deactivated
CS
Deactivated
CS
Deactivated
P ograr mm d
for
X
ScanMode
e
Reading
X-Data
Register
Detecting
Touch
WaitingforHosttoWrite
IntoControlByte1D[6:3]
Sample,Conversion,and
PreprocessingforXCoordinate
WaitingforHosttoWrite
IntoControlByte1D[6:3]
TouchisDetected
TouchisStillHere
t
COORDINATE
TSC2005
SBAS379C – DECEMBER 2006 – REVISED MARCH 2008
The time needed to convert any single coordinate (either X or Y) under host control (not including the time
needed to send the command over the SPI bus) is given by:
Figure 38. Example of a Single X Coordinate Touch Screen Scan
(with Panel Stabilization Time) using TSMode 3
38 Submit Documentation Feedback Copyright © 2006 – 2008, Texas Instruments Incorporated
Product Folder Link(s): TSC2005