Manual of Board ET-TOUCH PAD 4x4 V2
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1. SPECIFICATIONS of BOARD ET-TOUCH PAD 4x4 V2
- Be Capacitive Sensing 16-KEY Touch PAD (4x4)
- Use +3.3 VDC or +5VDC for Board
- Show status of pressing key of user by sound (Buzzer) and LED at particular Key’s position
- Can enable/disable sound (ON/OFF Buzzer) and setup operating system of LED Status Key by Jumper independently
- ET-TOUCH PAD 4x4 V2 displays initial status (Power-On) by Beep sound and LED Status Key flashes on and off regularly
- Divide Board into 2 parts; Touch PAD Board and MCU Control Board. Both parts are connected together by strong Connector.
- Has 2 types of OUTPUT for Key Code of Key that is pressed by user as follows;
1)
Binary Code (BCD8421)
: Send value through CONNECTOR 8 PIN;
Pin T#/R and SHIF# shows status of pressing or releasing Key
2)
ASCII Code
: Send value though Connector RS232 (TTL and Line Driver); setup fixed Baud Rate at 9600.
ASCII ‘P’ or ‘R’ preceded Key Code to notify status of pressing or releasing Key
- If Key Touch Pad is made from translucent plastic, it is 1-3 millimeters thick (depending on humidity in the air). If it is made from other
materials, the thickness depends on electric sensitivity of each material.
- Has 1 special Key that can be either used as Normal Key or Key SHIF that is mutually pressed with other remaining keys (both key must be
pressed at the same time).
- Control the operating system of Buzzer and LED Status Key (when no Key is touched) by ASCII Command through RS232. It has to set
Jumper to enable Buzzer and LED Status Key
2. FEATURE and STRUCTURE of BOARD ET-TOUCH PAD 4x4 V2
Figure 2.1 shows arrangement of Touch PAD Board and MCU Control Board.
ET-TOUCH PAD 4x4 V2
Touch-PAD Board
MCU-Control Board
