KWIKSTIKK40UM

KwikStik-K40 User's Manual

Page 11 of 19

Refer to Table 4 “I/O Connectors and Pin Usage Table” for the specific K40 pin connections to the

General Purpose TWRPI socket.

Table 2. General Purpose TWRPI socket pinout

Left-side 2x10 Connector

Right-side 2x10 Connector

Pin

Description

1

5V VCC

2

3.3 V VCC

3

GND

4

3.3V VDDA

5

VSS (Analog GND)

6

VSS (Analog GND)

7

VSS (Analog GND)

8

ADC: Analog 0

9

ADC: Analog 1

10

VSS (Analog GND)

11

VSS (Analog GND)

12

ADC: Analog 2

13

VSS (Analog GND)

14

VSS (Analog GND)

15

GND

16

GND

17

ADC: TWRPI ID 0

18

ADC: TWRPI ID 1

19

GND

20

Reset

Pin

Description

1

GND

2

GND

3

I2C: SCL

4

I2C: SDA

5

GND

6

GND

7

GND

8

GND

9

SPI: MISO

10

SPI: MOSI

11

SPI: SS

12

SPI: CLK

13

GND

14

GND

15

GPIO: GPIO0/IRQ

16

GPIO: GPIO1/IRQ

17

GPIO: GPIO2

18

GPIO: GPIO3

19

GPIO: GPIO4/Timer

20

GPIO: GPIO5/Timer

2.7 Touch Interface

The capacitive touch sensing interface of the KwikStik implements the TSI module of the K40X256 as

well as the Freescale TSS touch sensing software suite (freescale.com/touch).

There are six individual electrodes on-board the KwikStik that simulate buttons. Touch Sensing

Software (TSS) can be implemented for all of the electrodes. Additionally, two of these signals (E1 and

E2) can use the TSI module.

The touch sensing input (TSI) module of the Kinetis MCUs provides capacitive touch sensing detection

with high sensitivity and enhanced robustness. Each TSI pin implements the capacitive measurement of

an electrode. In order to use TSI on E1 and E2, the pull-up resistors R107 and R108 must be removed

(they are not populated by default).

The Xtrinsic Touch Sensing Software (TSS) transforms Freescale MCUs into touch sensors, giving

designers the flexibility to select from more than 650 Freescale MCUs to add cost-effective touch

sensing functionality to their human-machine interface (HMI) designs.

Refer to Table 4 “I/O Connectors and Pin Usage Table” for the TSI and TSS signal connection details.