SX8652ICSTRT Semtech, SX8652ICSTRT Datasheet - Page 5

• Manufacturer Part Number: SX8652ICSTRT
• Description: 4/5-wire Resistive Touch Screen Controller (SPI)
• Manufacturer: Semtech

1.3. Pin Description
1.4. Simplified Block Diagram
The SX8652 simplified block diagram is shown in Figure 3.
Revision V1.6/July 2010
©2010 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
DFN WLCSP
Pin Number
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
#
screen
To the
A1
A2
A3
B3
C3
D3
D2
D1
C2
C1
B1
B2
touch
-
-
-
Name
AUX/WIPER Digital Input /
VDD
X+/BR
Y+/TR
X-/TL
Y-/BL
GND
SCLK
DIN
DOUT
NIRQ
NCS
NRST
(NC)
GND
AUX/WIPER
Type
Analog Input
Power Input
Analog IO
Analog IO
Analog IO
Analog IO
Ground
Digital Input
Digital Output
Digital Output
Digital Output, open drain Interrupt Request Output, Active low, Need external pullup
Digital Input
Digital Input
Power input
X+/BR
Y+/TR
Y-/BL
X-/TL
VDD
Figure 3. Simplified block diagram of the SX8652
Interface
Screen
Touch
Vref
Table 1. Pin description
Description
Conversion Synchronization (4-wire) or
Analog Auxiliary Input (4-wire) / Wiper Input (5-wire)
Input power supply, connect to a 0.1uF capacitor to GND
X+ Right electrode (4-wire) / Bottom Right (5-wire) channel
Y+ Top electrode (4-wire) /Top Right (5-wire) channel
X- Left electrode (4-wire) /Top Left (5-wire) channel
Y- Bottom electrode (4-wire) /Bottom Left (5-wire) channel
Ground
SPI Serial Clock Input
SPI Serial Data Input
SPI Serial Data Output
SPI Chip Select Input, Active low
DFN package only, Reset Input, Active low, Internal pull-up resistor
Not Connected
Backside Ground
in
ref-
ref+
15kV ESD Low Power 4-Wire / 5-Wire Resistive
Control
Page 5
ADC
POR
OSC
GND
Touchscreen Controller with SPI Interface
out
SX8652
Digital
Filter
SPI
NIRQ
NRST (DFN only)
NCS
SCLK
DOUT
DIN
VDD
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DATASHEET
To the
Host
SX8652