mikroElektronika DIGIPOT click User manual

click
BOARD
1. Introduction
DIGIPOT Click is an accessory board in
mikroBus™form factor. It features a single-
channel digital potentiometer MCP4161
with 8-bit resolution (256 wiper steps) and
industry-standard SPI serial interface. The
resistance value of the digital potentiometer
goes up to 10kΩ. It features outstanding AC/DC
characteristics and low power consumption. It
can be used in audio equipment, servo-motor
control, battery charging and control, LCD
contrast control, programmable lters etc.
www.mikroe.com
DIGIPOT click
Once you have soldered the headers your
board is ready to be placed into 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.
3. Plugging the board in
2 3
2. Soldering the headers
1
4. Driving the board
There are four screw terminals available for
further connections: PA, PB, PW and GND.
Data is sent to the board using industry
standard SPI communication interface.
On-board controller converts the received
digital value to the appropriate linearly
proportional resistance value.
Front and back side appearance
of the DIGIPOT click Board
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
bottom side is facing you upwards. Place
shorter parts of the header pins in the
both soldering pad locations.
Before using your click board, make sure to
solder the provided 1x8 male headers to
both sides of the board. Please locate the
headers in the top side of the inner box of
the board package, and take them out.

5. DIGIPOT click Board Schematics
Terminal B
Terminal W
Terminal A
GND
CN2
CN3
PB
PW
PA
R2
100K
VCCVCC
SCK
CS#
SDI
VCC
PWR SEL
R1
2K2
PWR
VCC
C1
100nF
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
SCK
CS#
SDI
1
2
3
4
8
7
6
5
1 2 3
J1
VCC
V5+3V3+
CS
SCK
SDI
VSS
VDD
P0B
P0W
P0A
U2
MCP4161
8. Support
MikroElektronika oers Free Tech Support
(www.mikroe.com/esupport) until the end
of product lifetime, so if something goes
wrong, we are ready and willing to help!
7. Code Examples
6. Power supply selection
.com
Once you have done all the necessary
preparations, it’s time to get your click board up
and running. We have provided the examples for
mikroC, mikroBasic and mikroPascal compilers
on our Libstock website. Just download them
and you are ready to start.
On-board PWR SEL zero-
ohm resistor (SMD jumper)
is used to determine
whether 5V or 3.3V power
supply is used. This resistor
is provided in 3.3V position by default. In order
to use DIGIPOT click with 5V development
system, it is necessary to resolder this jumper
to 5V position.