TSC2005
www.ti.com
SBAS379–DECEMBER 2006
OPERATION (continued)
Table 31. Preprocessing Delay
LPPRO
=
M =
1
W =
FOR B = 12 BIT
FOR B = 10 BIT
1, 4, 8, 16
2
2
3, 7
7
1
3
1
3
7
28
31
31
34
38
24
27
29
32
36
15
15
15
Programmed for
Self-Control
(PSM = 1)
X-Y Scan Mode
(Control Byte1
D[6:3] = 0001)
Reading Reading
X-Data Y-Data
Register Register
CS Deactivated
tCOORDINATE
Sample, Conversion, and
Preprocessing for
Y Coordinate
Sample, Conversion, and
Preprocessing for
X Coordinate
Sample, Conversion, and
Preprocessing for
Y Coordinate
Detecting
Touch
Detecting
Touch
Detecting
Touch
Detecting Touch
PINTDAV Programmed:
Touch is Detected
Touch is Detected
As PENIRQ,
CFR2, D[15:14] = 10
As DAV,
CFR2, D[15:14] = 11 or 01
Touch is Detected
As PENIRQ and DAV,
CFR2, D[15:14] = 00
Figure 31. X and Y Coordinate Touch Screen Scan using TSMode 1
32
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