5

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

Pin Configuration

1

2

3

4

5

6

7

8

17

18

19

20

13

14

15

16

37

38

39

40

29

30

31

32

43

54

53

52

51

50

49

44

9

10

11

12

22

23

24

21

33

34

35

36

47

46

45

48

26

27

28

25

41

42

56

55

Figure 3. QFN56 7x7 Pin Placement

Table 1. Pin Definition

Pin

Name

Description

1

VDDD

Digital power, connect 1uF to ground

2

VDDIO

Power for interface to Host, connect 0.1uF to ground

3

IO_SEL/RXD

Mux pin:

UART_RX: For PXI debug only

IO_SEL: External pull high or low to decide SPI or I2C interface (H: SPI; L: I2C)

4

TXD

UART_TX, for PXI debug only

5

IO_CLK

SPI or I2C clock

6

MISO_SDA

SPI MISO or I2C_SDA pin

7

NCS_A1

SPI CS pin or I2C slave address ID

8

MOSI_A0

SPI MOSI pin or I2C slave ID pin

9

INT

Interrupt to Host to indicate data ready

10

NRST

Host to reset PCT1339, active low.

11

VDDCP

Charge-pump input, connect 1uF to ground.

12

CIN

Charge-pump pin, connect 0.22uF between CIN and CIP.

13

CIP

Charge-pump pin, connect 0.22uF between CIN and CIP.

14

VDDAIO

Drive line power, connect 1uF to ground

15

DRV0

Drive line pin

16

DRV1

Drive line pin

17

DRV2

Drive line pin

18

DRV3

Drive line pin

19

DRV4

Drive line pin

20

DRV5

Drive line pin

21

DRV6

Drive line pin

22

DRV7

Drive line pin