Datasheet
TSC2101
SLAS392D− JUNE 2003 − REVISED MAY 2005
www.ti.com
79
Programmed
for Host
Controlled
Mode
Detecting Touch
Sample,Conversion &
Averaging for
Z1−Coordinate & Z2−Coordinate
Reading
Z1−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
Z1−Z2 Scan
Mode
Reading
Z2−Data
Register
/SS DEACTIVATED
Detecting
Touch
Programmed
for Host
Controlled
Mode
Detecting Touch
Sample,Conversion &
Averaging for
Y−Coordinate
Reading
X−Data
Register
Reading
Y−Data
Register
Detecting
Touch
Sample,Conversion &
Averaging for
X−Coordinate
Detecting
Touch
Sample,Conversion &
Averaging for
Y−Coordinate
Detecting
Touch
Touch Is Detected
Touch Is Detected
REG−00 of
PAGE−01
Is Updated
for
X−Y Scan
Mode
Waiting for Host to
Write into REG−00 of
PAGE−01
SS DEACTIVATED
(As PENIRQ
[D15−D14 = 00])
PINTDAV
(As PENIRQ & DATA_AVA
[D15−D14 = 10/11])
PINTDAV
Touch Is Detected
(As DATA_AVA
[D15−D14 = 01])
PINTDAV
Non-Touch Screen Measurement Operation
The time needed to make temperature, auxiliary, or battery measurements is given by:
t +
NJN
AVG
ƪ
ǒ
N
BITS
) 1
Ǔ
8MHz
ƒ
conv
) n
1
) n
2
ƫ
) 1Nj t
OSC
) 15 t
OSC
) n
3
t
OSC
where:
n
1
= 6 ; if ƒ
conv
= 8 MHz
7 ; if ƒ
conv
≠ 8 MHz
n
2
= 24 ; if measurement is for TEMP1 case
12 ; if measurement is for other than TEMP1 case
400 ns; if measurement is for the external/internal resistance using AUX1/AUX2
n
3
= 0 ; if external reference mode is selected
3 ; if t
REF
= 0 µs or reference is programmed for power up all the time.
1 + t
REF
/125 ns; if t
REF
≠
0 µs and reference needs to power down between conversions.
t
REF
is the reference power up delay time.