mikroElektronika TouchKey click User manual

2 3
2. Soldering the headers
3. Plugging the board in
Once you have soldered the headers your
board is ready to be placed into the desired
mikroBUS™socket. Make sure to align the
cut in the lower-right part of the board with
the markings on the silkscreen at the
mikroBUS™socket. If all the
pins are aligned correctly,
push the board all the way
into the socket.
Turn the board upward again. Make sure
to align the headers so that they are
perpendicular to the board, then solder the
pins carefully.
Turn the board upside down so that
the bottom side is facing you upwards.
Place shorter pins of the header into the
appropriate soldering pads.
Before using your click board™, make sure
to solder 1x8 male headers to both left and
right side of the board. Two 1x8 male headers
are included with the board in the package.
4. Essential features
TouchKey click oers a replacement
for standard mechanical switches and
buttons. It can be used in a wide variety of
applications and under diverse conditions,
but perhaps the most interesting feature is
that the keys can be toggled even through a
layer of glass, paper, or similar non-isolating
materials. The response time is just 100mS
at fast mode and 200mS at low power mode.
1
TouchKey click has four capacitive pads
powered by TTP224, a touchpad detector IC.
The board outputs an interrupt singnal for
each pad: OUTA, OUTB, OUTC and OUTD (in
place of default mikroBUS™RST, AN, PWM
and INT pins, respectivelly, respectively).
TouchKey click is designed to work either
with a 3.3V or 5V power supply.
1. Introduction
TouchKey click manual
ver 1.00
0100000080276
TouchKey click
click
BOARD™
www.mikroe.com

1
Key1
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
MIKROBUS DEVICE CONN.
1
2
3
VCC
R1
2K2
PWR
VCC
PWR SEL.
1
Key2
1
Key3
1
Key4
C1
27pF
C2
27pF
C3
27pF
C4
27pF
C5
100nF
KEY1
KEY2
KEY3
KEY4
KEY1
KEY2
KEY3
KEY4
AHLB
TOG
LPMB
VCC
OUTA
OUTB
OUTC
OUTD
SM
OD
MOT0
1
2
J1
1
2
J2
1
2
J3
1
2
J4
1
2
J5
1
2
J6
VCC VCC VCC
AHLB
TOG
TP0
1
TP1
2
TP2
3
TP3
4
AHLB
5
VDD
6
TOG
7
LPMB
8MOT0 9
VSS 10
OD 11
SM 12
TPQ3 13
TPQ2 14
TPQ1 15
TPQ0 16
U1
TTP224
LPMB
OUTA
OUTB OUTC
OUTD
MOT0 OD SM
8. Code examples
MikroElektronika oers free tech support
(www.mikroe.com/support) until the end of
the product’s lifetime, so if something goes
wrong, we’re ready and willing to help!
Once you have done all the necessary
preparations, it’s time to get your click board™
up and running. We have provided examples
for mikroC™, mikroBasic™and mikroPascal™
compilers on our Libstock website. Just
download them and you are ready to start.
.com
6. Dimensions
MikroElektronika assumes no responsibility
or liability for any errors or inaccuracies
that may appear in the present document.
Specication and information contained in
the present schematic are subject to change
at any time without notice.
Copyright © 2015 MikroElektronika.
All rights reserved.
mm mils
LENGTH 57.15 2250
WIDTH 25.4 1000
HEIGHT* 3.2 126
5. Schematic
7. SMD jumpers
9. Support
25.4 mm / 1000 mils
57.15 / 2250 mils
* without headers
10. Disclaimer
DEFAULT SECONDARY
LPMB Fast Low power
TOG Direct Toggle
AHLB High output Low output
MOT0 Infinite
on time
16 Sec.
Max on time
OD CMOS active Open drain
SM Multi-key Single-key
TouchKey click has three jumpers for putting
the TTP224 IC into dierent operating modes.