Datasheet

www.ti.com
t
COORDINATE
+
OH2
f
OSC
)
ǒ
t
PRE
)t
SNS
)
OH
DLY2
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
(9)
NOTE:(1)Optional.Ifnotturnedon,itwillbeturnedonbytheScanmode,oncedetected.
Detecting
Touch
PINTDAV Programmed:
As ,
CFR2,D[15:14]=10
PENIRQ
As ,
CFR2,D[15:14]=11or01
DAV
As and ,
CFR2D[15:14]=00
PENIRQ DAV
Programmed
for
Host-Controlled
Mode
(PSM=0)
TSC
Not
Addressed
Z
Scan
Mode
Reading
Z -Data
Register
1
WaitingforHosttoWrite
IntoControlByte1D[6:3]
TouchisDetected
Reading
Z -Data
Register
2
TSC
NotAddressed
TSC
NotAddressed
Detecting
Touch
WaitingforHosttoWrite
IntoControlByte1D[6:3]
TouchisDetected
t
COORDINATE
TurnOn
Y+
and
X
Drivers
-
(1)
Programmedfor:
Sample,Conversion,
andPreprocessing
forZ Coordinate
1
Sample,Conversion,
andPreprocessing
forZ Coordinate
2
t
COORDINATE
+
OH2
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
(10)
Detecting
Touch
PINTDAV Programmed:
As ,
CFR2,D[15:14]=10
PENIRQ
As ,
CFR2,D[15:14]=11or01
DAV
As and ,
CFR2D[15:14]=00
PENIRQ DAV
Programmedfor
Host-Controlled
Mode
(PSM=0)
TSC
NotAddressed
P ograr mm d
for
Z -Z
ScanMode
e
1 2
Reading
Z -Data
Register
1
WaitingforHosttoWrite
IntoControlByte1D[6:3]
Sample,Conversion,and
PreprocessingforZ ,Z Coordinates
1 2
TouchisStillHere
Reading
Z -Data
Register
2
TSC
NotAddressed
TSC
NotAddressed
Detecting
Touch
WaitingforHosttoWrite
IntoControlByte1D[6:3]
TouchisDetected
t
COORDINATE
TSC2004
SBAS408E – JUNE 2007 – REVISED MARCH 2008
The time needed to convert any Z
1
and Z
2
coordinate under host control (not including the time needed to send
the command over the I
2
C bus) is given by:
Figure 43. Example of Z
1
and Z
2
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 I
2
C bus) is given by:
Figure 44. Example of a Z
1
and Z
2
Coordinate Touch Screen Scan
(with Panel Stabilization Time) using TSMode 3
46 Submit Documentation Feedback Copyright © 2007 – 2008, Texas Instruments Incorporated
Product Folder Link(s): TSC2004