MIKROE-1889 MikroElektronika

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 4x4 Key click 2 3 4. Essential features The design of 4x4 Key click inputs are read by a pair of connected 8-bit parallel-in serial- out shift registers allows for multiple key presses at the same time. You can press all 16 buttons simultaneously and each will be Turn the board upside down so that Turn the board upward again. Make sure registered. For ease of use, each button has the bottom side is facing you upwards. to align the headers so that they are silkscreen markings. The right-most column Place shorter pins of the header into the perpendicular to the board, then solder the is marked with letters A-D, the other 12 appropriate soldering pads. pins carefully. buttons are marked like a telephone keypad. 1. Introduction 3. Plugging the board in click 4x4 Key click carries a 16 button keypad Once you have soldered the headers your with two shift registers, allowing you to board is ready to be placed into the desired BOARD connect a keypad to a microcontroller mikroBUS socket. Make sure to align the www.mikroe.com without using too many I/Os. 4x4 Key click cut in the lower-right part of the board with communicates with the target board MCU the markings on the silkscreen at the through mikroBUS SPI pins (CS, SCK, mikroBUS socket. If all the 4x4 Key click manual ver 1.00 MISO, MOSI). The board is designed to use pins are aligned correctly, either a 3.3V or 5V power supply. push the board all the way into the socket. 01000000789528. Code examples 5. Schematic Once you have done all the necessary preparations, its time to get your click board up and running. We have provided examples VCC PWR SEL. VCC VCC VCC VCC VCC VCC for mikroC , mikroBasic and mikroPascal U1 R1 R2 R3 R4 10K 10K 10K 10K CS 1 16 T1 T1 T2 T2 T3 T3 T4 T4 compilers on our Libstock website. Just SH/LD VCC SCK 2 15 C1 C2 C3 C4 CLK INH download them and you are ready to start. 10nF 10nF 10nF 10nF T5 3 14 T4 R17 E D 2K2 T6 4 13 T3 AN PWM F C RST INT CS T7 5 12 T2 CS TX G B VCC VCC VCC VCC SCK SCK RX MISO T8 6 11 T1 R5 R6 R7 R8 MISO SCL H A .com PWR MOSI 10K 10K 10K 10K SDA MOSI T5 T6 T7 T8 7 10 MOSI T5 T6 T7 T8 +3.3V +5V QH SER GND GND 8 9 SER C5 C6 C7 C8 GND QH 10nF 10nF 10nF 10nF MIKROBUS DEVICE CONN. 74HC165 U2 VCC VCC VCC CS 1 16 9. Support SH/LD VCC VCC VCC VCC VCC SCK 2 15 R9 R10 R11 R12 CLK INH 10K 10K 10K 10K T13 3 14 T12 T9 T9 T10 T10 T11 T11 T12 T12 E D C17 C18 100nF 100nF T14 4 13 T11 C9 C10 C11 C12 MikroElektronika offers free tech support F C 10nF 10nF 10nF 10nF T15 5 12 T10 G B (www.mikroe.com/support) until the end of T16 6 11 T9 H A the products lifetime, so if something goes 7 10 SER VCC VCC VCC VCC QH SER wrong, were ready and willing to help 8 9 MISO R13 R14 R15 R16 GND QH 10K 10K 10K 10K T13 T13 T14 T14 T15 T15 T16 T16 74HC165 C13 C14 C15 C16 10nF 10nF 10nF 10nF 6. Dimensions 7. SMD jumper 10. Disclaimer MikroElektronika assumes no responsibility mm mils or liability for any errors or inaccuracies that may appear in the present document. LENGTH 57.15 2250 Specification and information contained in WIDTH 25.4 1000 the present schematic are subject to change HEIGHT* 5.25 207 at any time without notice. 4x4 Key click has a PWR SEL jumper (zero 57.15 / 2250 mils * without headers ohm resistor) that lets you switch the board Copyright 2015 MikroElektronika. form 3.3V to 5V power supply. All rights reserved. 1 2 3 25.4 mm / 1000 mils