MIKROE-951

2. Soldering the headers 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. 1 EXPAND click 2 3 Turn the board 1. Introduction upside down, so Turn the board that bottom side is facing upward again. 4. Using The Board you upwards. Place shorter Make sure to align parts of the header the headers so that they are Communication with on-board port expander pins in the perpendicular to the is done through SPI communication interface. soldering pad board, then solder The 16 I/O port bits are divided into two 8-bit locations. the pins ports (PORTA and PORTB). The MCP23S17 carefully. can be congfi ured 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 is an accessory board in 3. Plugging the board in mikroBus form factor. It includes a 16-bit click I/O expander MCP23S17 with SPI clock Once you have soldered the headers your speeds up to 10 MHz for higher throughput board is ready to be placed into desired BOARD applications. Three HARDWARE ADDRESS mikroBUS socket. Make sure to align the www.mikroe.com SEL jumpers allow you to congfi ure board cut in the lower-right part of the board address and connect up to eight devices on with the markings on the silkscreen at the EXPAND click Manual the bus. Controller also supports interrupt-on- mikroBUS socket. If all the pins are aligned ver. 1.00 change. Board is set to use 3.3V power supply correctly, push the board all the way by default. Solder PWR SEL SMD jumper to into the socket. 5V position if used with 5V systems. 0 100000 0200746. SMD Jumpers 5. EXPAND click Board Schematics VCC VCC VCC There are four zero-ohm resistors (SMD jumpers): PWR SEL is used to determine R2 R1 R0 100K 100K 100K whether 5V or 3.3V power supply is used, J4 J2 J1 J0 INTA 1 3 3 3 and three HARDWARE ADDRESS SEL for INT 2 2 A2 2 A1 2 A0 VCC INTB 3 1 1 1 selecting the device address. R3 2K2 VCC 7. Code Examples PWR C1 VCC Once you have done all the necessary R4 100nF preparations, its time to get your click 100K board up and running. We have provided U1 CN4 RB0 1 28 RA7 RA0 RA1 the examples for mikroC, mikroBasic and VCC GPB0 GPA7 J3 RB1 2 27 RA6 RA2 RA3 GPB1 GPA6 mikroPascal compilers on our Libstock RB2 3 26 RA5 RA4 RA5 GPB2 GPA5 RB3 4 25 RA4 RA6 RA7 website. Just download them and you are GPB3 GPA4 +3V3 +5V RB4 5 24 RA3 GPB4 GPA3 ready to start. RB5 6 23 RA2 GPB5 GPA2 M2X5 RB6 7 22 RA1 AN PWM GPB6 GPA1 PORTA RST INT RB7 8 21 RA0 RST INT GPB7 GPA0 CS 9 20 INTA CS RX VCC INTA CN5 .com SCK 10 19 INTB RB0 RB1 SCK TX GND INTB SDO CS 11 18 RST RB2 RB3 SCL CS RESET MISO SDI SCK 12 17 A2 RB4 RB5 MOSI SDA SCK A2 SDI 13 16 A1 RB6 RB7 +3.3V +5V SI A1 SDO 14 15 A0 GND GND SO A0 8. Support M2X5 MCP23S17 PORTB MikroElektronika oers ff 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 MikroElektronika assumes no responsibility or liability for any errors or inaccuracies that may appear in the present document. Specification and information contained in the present schematic are subject to change at any time without notice. Copyright 2012 MikroElektronika. All rights reserved. 1 2 3 MCP23S17