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PixArt Imaging Inc.

PCT1339 Product Datasheet

Multi-Touch Capacitive Touch Controller

PixArt Imaging Inc. http://www.pixart.com

All rights reserved. Any portion in this paper shall not be reproduced, copied, or transformed to any other forms without permission.

Version 1.0 |11 Apr 2016

Reference Schematic

PCT1339 supports two types of wire connections.

To use PCT1339’s internal regulator and charge pump.

This is the preferred one. Host provides minimum 2.3V power to VIN pin then internal regulator regulate the voltage to all

domains. As shown in Figure 12, V_IN and VDDIO are the powers need to be supplied.

IO_SEL/RXD

VDDIO

PCT1339

ROW6

ROW4

ROW3

ROW5

ROW7

VDDIO from Host

SEN9

SEN7

SEN15

SEN5

SEN8

SEN6

SEN4

COL19

COL18

COL17

COL2

COL1

SDA

NRST

T

o

u

c

h

a

d

ROW2

COL0

VDDA

ROW1

ROW0

COL3

COL4

COL5

37

36

35

34

32

31

30

33

8

7

6

5

4

3

2

1

VDD

TXD

IO_CLK

MISO_SDA

NCS_A0

INT

SCL

C5

0.1 uF

C1

1uF

INT

R1

10k

SEN10

38

SEN11

39

40

SEN12

SEN13

42

COL16

COL15

COL14

COL13

COL12

NRST

9

CIN

CIP

10

11

12

VDDAIO

13

14

ROW8

ROW9

ROW10

ROW11

COL6

COL7

COL8

COL9

C3

1 uF

Test Point

C8

1uF

L for I2C

VDDCP

MOSI_A1

C6

1uF

C7

0.22uF

COL10

COL11

29

SEN14

SEN16

41

ROW12

ROW13

ROW14

COL22

COL21

COL20

COL23

C2

1 uF

C4

1 uF

Figure 12. Reference Schematic to Use Internal Regulator with charge pump