Datasheet

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MONO+
MONO-
VOUTR
VOUTL
AGND
AVDD
HPL
HPR
HPGND
X-
Y-
X+
Y+
HPVDD
AUX1
AUX2
R1
RESET
KBIRQ
DGND
DVDD
I2SDOUT
I2SDIN
LRCLK
BCLK
MCLK
COO
COI
DAV
SPI_DOUT
SPI_DIN
SPI_CLK
VBAT1
VBAT2
VREFIN
DACset
DACout PENIRQ POL
GPIO_0 GPIO_1 GPIO_2 GPIO_3 GPIO_4
GPIO_5/CLK0
DVDD
DGND
SS
VREF-
VREF+ AFILTL
AFILTR
VCM
MICBIAS
MICIN
AUXINR
RLINEIN
C4
C3 C2 C1 R4 R3 R2
TSC2301
TOUCH
SCREEN
MONO
AMP
Voltage
Regulator
Voltage
Regulator
Main
Battery
Secondary
Battery
LCD Contrast Control
KEYPAD
HEADPHONE
JACK
MICROPHONE
JACK
Rbias
A
A
A A
A
A
A
A
AA
A
A
A
A
AA
A
A
A
Auxilliary Inputs
D
DD
D
D
DD
D
11 12 13 14 15 16
15 pF
Rrng
1nF
1nF
Line Outputs
Line Inputs
0
15 1314 12
11 10
12
4
3
567
89
D
DVDD
1 to 10
µF
0.1 µF
1 µF
1 µF
1 µF
220 µF
220 µF
10 Ω
to 100 Ω
1 µF
1 µF
1 to 10
µF
0.1 µF
0.1 µF1 to 10
µF
1 to 10
µF
0.1 µF
1 to 10
µF
0.1 µF
15 pF
1 to 10
µF
0.1 µF
1 µF
DETAILED DESCRIPTION
OPERATION - TOUCH SCREEN
TSC2301
SLAS371D – SEPTEMBER 2002 – REVISED AUGUST 2004
OVERVIEW (continued)
Figure 44. Typical Circuit Configuration
A resistive touch screen works by applying a voltage across a resistor network and measuring the change in
resistance at a given point on the matrix where a screen is touched by an input stylus, pen, or finger. The change
in the resistance ratio marks the location on the touch screen.
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