MR-MINI-4X4KEY Gravitech, MR-MINI-4X4KEY Datasheet - Page 2

• Manufacturer Part Number: MR-MINI-4X4KEY
• Description: Daughter Cards & OEM Boards 4X4 MATRIX KEYBOARD BOARD
• Manufacturer: Gravitech

Specifications of MR-MINI-4X4KEY

• Rohs: yes
• Product: Mini 4x4 Matrix Keyboard Boards
• Description/function: MR-MINI-4x4KEY is a 4x4 matrix keyboard module
• Dimensions: 2.2 in x 1.7 in
• Operating Supply Voltage: 3 V to 5 V
• For Use With: MR-10RC-FF

The MR-MINI-4x4KEY is a 4x4 matrix
keyboard module. It is 10-PIN MRconnect
ready. It has 8 pins to interface with MCU
(microcontroller). PIN1-PIN4 (COLUMN) is
INPUT for MCU to reads the status of key
pressing. PIN5-PIN8 (ROW) is OUTPUT for
MCU to send logic LOW to scan key press
on each row. MCU operation is sending logic
LOW into each key’s ROW (PIN5-PIN8). The
MCU is then reading the status of key press
from PIN1-PIN4. If any key is pressed, the
status read logic LOW, otherwise the logic is
HIGH. PCB size is 2.20” x 1.70”
Specifications:
• 10-PIN MRconnect
• +3.0V to +5VDC supply voltage
• On-board pulled-up resistors
• Small and compact in size
• Four mounting holes on each corner
MR-MINI-4x4KEY
Description
Copyright © 2007 MicroResearch
GRAVITECH GROUP
©
ready
TM
Mini 4x4 Matrix Keyboard BOARD
User Manual
©
WWW.GRAVITECH.US
Pin1-Pin4 Output Key press output status
Pin5-Pin8 Input
+VCC
NC
All of the accessories are available for
purchase via our website. If you don’t see
the item you need, please contract our sales
department at
Name
• MR-10RC-FF
Pin out:
10-PIN 12” ribbon cable.
FIG 1: Top view pin out
PWR
NC
Type
Accessories
[e-mail]
Scan key press input
Supply voltage
No connect
Description
(3-5VDC)