MIKROE-1838

2. Soldering the headers 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. 1 EXPAND 2 click 2 3 4. Essential features Communication with on-board port expander 2 is done through I C communication interface. The 16 I/O port bits are divided into two 8-bit ports (marked HD1 and HD2). The MCP23017 Turn the board upside down so that Turn the board upward again. Make sure can be configured to operate in the 8-bit or the bottom side is facing you upwards. to align the headers so that they are 16-bit mode. All pins act as bidirectional I/Os Place shorter pins of the header into the perpendicular to the board, then solder the and can be enabled for interrupt-on-change appropriate soldering pads. pins carefully. and/or internal weak pull-up resistor. 1. Introduction EXPAND 2 click is an accessory board in 3. Plugging the board in mikroBus form factor. It includes a 16-bit 2 click I/O expander MCP23017 with I C clock speeds Once you have soldered the headers your of 100 kHz, 400 kHz, or 1.7 MHz for higher board is ready to be placed into the desired BOARD throughput applications. Three HARDWARE mikroBUS socket. Make sure to align the www.mikroe.com ADDRESS SEL jumpers allow you to configure cut in the lower-right part of the board with board address and connect up to eight devices the markings on the silkscreen at the on the bus. Controller also supports interrupt- mikroBUS socket. If all the EXPAND 2 click manual ver 1.00 on-change. Board is set to use 3.3V power pins are aligned correctly, supply by default. Solder PWR SEL SMD jumper push the board all the way to 5V position if used with 5V systems. into the socket. 01000000747328. Code examples 5. Schematic VCC VCC VCC Once you have done all the necessary R2 R3 R4 preparations, its time to get your click board 100K 100K 100K INTB INT A0 A1 A2 up and running. We have provided examples INTA for mikroC , mikroBasic and mikroPascal J2 J3 J4 J5 VCC compilers on our Libstock website. Just download them and you are ready to start. C1 100nF VCC VCC .com R5 R6 VCC VCC VCC VCC 4k7 4k7 U1 J1 PB0 1 28 PA7 PA0 PA1 R1 GPB0 GPA7 PB1 2 27 PA6 PA2 PA3 2K2 GPB1 GPA6 PB2 3 26 PA5 PA4 PA5 GPB2 GPA5 LD1 PB3 4 25 PA4 PA6 PA7 GPB3 GPA4 9. Support PB4 5 24 PA3 GPB4 GPA3 PB5 6 23 PA2 AN PWM GPB5 GPA2 HD1 RST INT PB6 7 22 PA1 RST INT GPB6 GPA1 PB7 8 21 PA0 CS TX GPB7 GPA0 MikroElektronika offers free tech support 9 20 INTA SCK RX VCC INTA SCL 10 19 INTB PB0 PB1 SCL GND INTB MISO (www.mikroe.com/support) until the end of SDA 11 18 RST PB2 PB3 MOSI SDA NC RESET SCL 12 17 A2 PB4 PB5 +3.3V +5V SCL A2 the products lifetime, so if something goes SDA 13 16 A1 PB6 PB7 GND GND SDA A1 14 15 A0 wrong, were ready and willing to help NC A0 MIKROBUS DEVICE CONN. HD2 MCP23017 6. Dimensions 7. SMD jumpers 10. Disclaimer MikroElektronika assumes no responsibility mm mils or liability for any errors or inaccuracies that may appear in the present document. LENGTH 57 2244 Specification and information contained in WIDTH 25.4 1000 There are four zero-ohm resistors (SMD the present schematic are subject to change HEIGHT* 3.2 157.5 jumpers): PWR SEL is used to determine at any time without notice. whether 5V or 3.3V power supply is used, and 28.5 mm / 1122 mils * without headers three hardware ADDR SEL for selecting the Copyright 2015 MikroElektronika. device address. All rights reserved. 25.4 mm / 1000 mils MCP23017