Mikroe Click Board Expand Click User manual

1. Introduction
EXPAND Click is an accessory board in
mikroBus™form factor. It includes a 16-bit
I/O expander MCP23S17 with SPI clock
speeds up to 10 MHz for higher throughput
applications. Three HARDWARE ADDRESS
SEL jumpers allow you to congure board
address and connect up to eight devices on
the bus. Controller also supports interrupt-on-
change. Board is set to use 3.3V power supply
by default. Solder PWR SEL SMD jumper to
5V position if used with 5V systems.
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. Using The Board
Communication with on-board port expander
is done through SPI communication interface.
The 16 I/O port bits are divided into two 8-bit
ports (PORTA and PORTB). The MCP23S17
can be congured to operate in the 8-bit or
16-bit mode. All pins act as bidirectional I/Os
and can be enabled for interrupt-on-change
and/or internal weak pull-up resistor.
EXPAND click
Turn the board
upside down, so
that bottom side is facing
you upwards. Place shorter
parts of the header
pins in the
soldering pad
locations.
Turn the board
upward again.
Make sure to align
the headers so that they are
perpendicular to the
board, then solder
the pins
carefully.
Before using your click board, make sure
to solder the provided 1x8 male headers
to both sides of the board. Two 1x8 male
headers are included with the board in
the package.
click
BOARD
www.mikroe.com
EXPAND click Manual
ver. 1.00
0 100000 020074

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. EXPAND click Board Schematics 6. SMD Jumpers
There are four zero-ohm resistors (SMD
jumpers): PWR SEL is used to determine
whether 5V or 3.3V power supply is used,
and three HARDWARE ADDRESS SEL for
selecting the device address.
CS# RST#
A0SDO
SDI
SCK
A1
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
A2
RA4
RA2
RA5
RA3
RA1
RA0
RB1
5BR4BR
RB3
RA1
RA6
RA5
RA7
PORTA
PORTB
RA0
RB0
RA6
RA7
RA2
RA4
RA3
RB2
7BR6BR
INTA
INTB
A2
CS#
AN
RST
CS
SCK
MOSI
MISO
+3.3V
GND
PWM
INT
RX
TX
SCL
SDA
+5V
GND
1 2 3
J3
VCC
+5V+3V3
R3
2K2
VCC
PWR
C1
100nF
INT
INTB
1
2
3
J4
SCK
SDI
RST#
SDO
INT
INTA
CN4
M2X5
CN5
M2X5
VCC
VCC
R4
100K
1
2
3
J2
R2
100K
VCC
A1
1
2
3
J1
R1
100K
VCC
A0
1
2
3
J0
R0
100K
VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28
GPB0
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VCC
GND
CS
SCK
SI
SO
GPA2
GPA1
GPA7
GPA6
GPA5
GPA4
GPA3
GPA0
RESET
INTA
INTB
A2
A1
A0
MCP23S17
U1
MCP23S17
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 © 2012 MikroElektronika. All rights reserved.

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Mikroe:
MIKROE-951