微型开发板说明书

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2. Soldering the headers
3. Plugging the board in
Once you have soldered the headers your board is ready to be placed into the 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.
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 the bottom side is facing you upwards. Place shorter pins of the header into the appropriate soldering pads.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.
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 registered. For ease of use, each button has silkscreen markings. The right-most column is marked with letters A-D, the other 12 buttons are marked like a telephone keypad.
1
4x4 Key click carries a 16 button keypad with two shift registers, allowing you to connect a keypad to a microcontroller without using too many I/Os. 4x4 Key click communicates with the target board MCU through mikroBUS ™ SPI pins (CS, SCK, MISO, MOSI). The board is designed to use either a 3.3V or 5V power supply.
1. Introduction
4x4 Key click manual
ver 1.00
0100000078952
4x4 Key click
click
BOARD
™
T1T2T3T4
AN RST CS SCK MOSI MISO +3.3V GND PWM INT RX TX SCL SDA +5V GND
MIKROBUS DEVICE CONN.
1
2
3
VCC VCC
R1
10K
T1CS SCK MISO MOSI
R172K2
PWR
C110nF
VCC
R210K
T2C210nF
VCC
R310K
T3C310nF
VCC
R410K
T4C410nF
VCC
R510K
T5
C510nF
T5VCC
R610K
T6C610nF
T6VCC
R710K
T7C710nF
T7VCC
R810K
T8C810nF
T8
VCC
R910K
T9
C910nF
T9VCC
R1010K
T10C1010nF
T10VCC
R1110K
T11C1110nF
T11VCC
R1210K
T12C1210nF
T12
VCC
R1310K
T13
C1310nF
T13VCC
R1410K
T14C1410nF
T14VCC
R1510K
T15C1510nF
T15VCC
R1610K
T16
C1610nF
T16
VCC
SH/LD 1CLK 2E 3F 4G 5H 6QH 7GND
8
QH
9
SER 10A 11B 12C 13D 14INH 15VCC 1674HC165
VCC
CS SCK
SER MISO
T9T10T11T12T13T14T15T16
SH/LD 1CLK 2E 3F 4G 5H 6QH 7GND
8
QH
9
SER 10A 11B 12C 13D 14INH 15VCC 16U1
74HC165U2
CS SCK
SER
MOSI T1T2T3T4T5T6T7
T8
VCC C17100nF
VCC
C18100nF
VCC
PWR SEL.8. Code examples
MikroElektronika offers free tech support (/support) until the end of the product’s lifetime, so if something goes wrong, we’re ready and willing to help!
Once you have done all the necessary preparations, it’s time to get your click board ™ up and running. We have provided examples for mikroC ™, mikroBasic ™ and mikroPascal ™ compilers on our Libstock website. Just download them and you are ready to start.
.com
6. Dimensions
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 © 2015 MikroElektronika.All rights reserved.
mm
mils
LENGTH 57.152250WIDTH 25.41000HEIGHT*
5.25
207
5. Schematic
7. SMD jumper
9. Support
25.4 m m / 1000 m i l s
57.15 / 2250 mils
* without headers
10. Disclaimer
4x4 Key click has a PWR SEL jumper (zero ohm resistor) that lets you switch the board form 3.3V to 5V power supply.。