Mikroe FM click User manual

1. Introduction
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 of 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. Essential features
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 both
soldering pad locations.
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.
click
BOARD
www.mikroe.com
FM click Manual
ver. 1.01
0 100000 023785
FM Click™is an accessory board in
mikroBUS™form factor. It’s a compact and
easy solution for adding broadcast FM radio
tuner to your design. It features Si4703 FM
radio tuner, two LM4864 audio ampliers
as well as stereo audio connector. FM
Click™communicates with the target board
microcontroller via mikroBUS™ I2C (SDA,
SCL), INT, RST, CS and AN lines. The board
is designed to use 3.3V power supply only.
LED diode (GREEN) indicates the presence
of power supply.
FM click
FM Click™ with it’s Si4703 IC is a complete
FM radio tuner (from antenna input to stereo
audio output). It supports worldwide FM
band (76 – 108 MHz). The board contains
automatic frequency and gain control, RDS/
RBDS processor, seek tuning and volume
control. All these features make this board
ideal for MP3 players, portable radios, PDAs,
notebook PCs, portable navigations and
many more.

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
.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.
5. FM Click™ Board Schematic
C2
100nF
C1
22nF
GPIO1
R1
2K2
LD1
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
MIKROBUS DEVICE CONN.
NC
FMIP
RFGND
GND
RST
RCLK VIO
VDD
GND
ROUT
VA
GND
LOUT
SEN
SCLK SDIO
GPIO3
NC
GPIO1
GPIO2
GND PAD
U1
Si4703
VCCVCC
1
2
3
54
6
7
8
SHTDWN
BYPASS
IN+
IN- Vo1
Vdd
GND
Vo2
U2 LM4864
R6
20K
E1
10uF
C10 100nF
R5
20K
1
2
3
54
6
7
8
SHTDWN
BYPASS
IN+
IN- Vo1
Vdd
GND
Vo2
U3 LM4864
R8
20K
R7
20K
VCC
CN1
STEREO SWITCH CONN
X1
32.768KHz
C4
10pF
C5
10pF
C3
1nF
L1 270nH
FP1
FERRITE
FP2
FERRITE
C6
100nF
C7
100nF
C8
100nF
C9
100nF
E4
10uF
E2 10uFE5 10uF
C11 100nF
E3
10uF
E6
10uF
R9
10K
R4
10K
R3
4K7
R2
4K7
GPIO2
#RST
#SEN
SCLK
SDIO
SCLK
SDIO
#RST
#SEN
GPIO1
GPIO2
VCC
VCCVCCVCC
VCC
VCC
VCC
VCC
1234
1 2 3 4Pin Number
Description Left Audio Right Audio Antenna Antenna
124
1 2 4Pin Number
Description Left Audio Right Audio Antenna
1
2
3
4
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 © 2013 MikroElektronika. All rights reserved.
6. Earphones and antenna
FM antenna is provided through the earphones
cable (recommended length between 1.1 and
1.45 m). The board supports 3 and 4 conductor
earphones with pinout as shown in schematic.
Earphones are not included in the package

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