KWIKSTIK-K40 Datasheet, PDF (11/19 Pages) Freescale Semiconductor, Inc – KwikStik board assembly

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
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
Right-side 2x10 Connector
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.
KWIKSTIKK40UM
KwikStik-K40 User's Manual
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