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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
Touch-PAD Board
Manual of Board ET-TOUCH PAD 4x4 V2
ET-TOUCH PAD 4x4 V2
MCU-Control Board
Figure 2.1 shows arrangement of Touch PAD Board and MCU Control Board.
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Summary of Contents for ETT ET-Touch PAD 4x4 V2
- Page 1 - 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.
- Page 2 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER From Figure 2.1 above, it shows how to assemble Board ET-TOUCH 4x4 V2 when separated this board into 2 parts and then re- assembled both parts together, please assemble board as shown in the figure above. While assembling both parts together, please notice direction of the arrowhead or cut-angle PCB of MCU-Control Board, it must be the same direction as shown at the back of Touch PAD Board;...
- Page 3 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER -1. LED-STATUS : This LED shows status of pressing Key; it regularly flashed on and off according to Key that is pressed/released by user. It regularly flashes on and off when Board is in Power-ON. This LED is controlled by ASCI Command through RS232.
- Page 4 -10. O/P BCD Key Code : This is Connector 8PIN as shown in the picture 2.7; it sends Key Code of any pressed/released Key in the format of Binary BCD8421. Moreover, it sends status of pressing/releasing Key to user and it is used as Connector Power Supply for ET-TOUCH PAD 4x4 V2. Figure 2.7 shows Connector to read Key Code as Binary BCD8421.
- Page 5 Key from PIN T#/R and SHIF#. -11. LOAD-FW : It upgrades Firmware for ET-TOUCH PAD 4x4 V2 (normally, it has to return to ETT to upgrade Firmware). : This Connector 20PIN is connected to Board TOUCH-PAD to receive signal touching from user.
- Page 6 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER Table: KEY CODE of ET-TOUCH PAD 4x4 V2 FOR Binary MODE FOR ASCII Mode (RS232 TTL-Line Drive) BCD 8421 KEY CODE ASCII KEY CODE ASCII 0x01 ‘1’ 0x31 0x02 ‘2’...
- Page 7 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER - Status of Press 1 Key = When pressed any Key, it produces Beep sound and LED Status of the pressed Key is lit up (ON) and status at Connector 8PIN is changed as follows;...
- Page 8 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER Key7,KeyF+Key7 Figure 3.4 shows example of status at Pins of Connector 8PIN when releasing single Key(Key 7) or both Key (Key F+Key 7). 2 Key 1Key Release Key Logic...
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Page 9: Ascii Code
CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER -Initial Status (Default) = When Power-ON, LED Status Key flashes on and off regularly according to Beep sound but it does not send out any data to Port 232. It means that Touch Pad does not send out any value through Port 232 if user does not press any key. - Page 10 3 Byte ASCII Command that is *OK to notify user to know that it is ready to receive the next Command. If user sends any Command incorrectly, there is no response from Board ET-TOUCH PAD 4x4 V2. The format of Command is listed below;...
- Page 11 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER Ex. Send Command ON-Buzzer for 1 second and then OFF-Buzzer Main() char enter = 0x0D ; printf(‚#BZ=1‛,enter) ; //Sent Command On-Buzzer delay_ms(1000) printf(‚#BZ=0‛,enter) ; //Sent Command Off-Buzzer 2.) COMMAND ‘BP’ (SOUND BEEP) This Command produces Beep sound;...
- Page 12 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER Format = ‘5’ Format = ‘6’ Format = ‘8’ Format = ‘7’ ‘5’ = ON-LED Row1 4 ดวง ‘6’ = ON-LED Row2 4 ดวง ‘7’ = ON-LED Row3 4 ดวง...
- Page 13 Board ET-BASE AVR EASY MEGA168 * PIN SHIF# Connect For Ex.2,Ex3 Figure 5.1 shows how to connect circuit to read Key Code as BCD of Board ET-TOUCH PAD 4x4 V2 and ET-BASE AVR EASY MEGA168. Display to PC Hypertermina RS232...
- Page 14 ET-BASE PIC8722(ICD2) * PIN SHIF# Connect For Ex.2,Ex3 Figure 5.4 shows how to connect circuit to read Key Code as BCD of Board ET-TOUCH PAD 4x4 V2 and ET-BASE PIC8722 (ICD2). Ex2_Read_BCD_ShifKey: This second example illustrates how to read Key Code as BCD8421, it is the same as the example 1 above but it presses Key F together with another Key.
- Page 15 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER Ex3_Application_BCD_ShifKey: This example 3 illustrates how to apply the operation by pressing Key F together with another Key, the circuit’s connection in the part of ET-TOUCH PAD and MCU is still the same as the example 1 above because it has to connect PIN SHIF# to MCU.
- Page 16 CODE in order to read value of Key Code of each Key that is pressed. User can read the value from Connector RS232(3) or TTL232(7) of ET-TOUCH PAD 4x4 V2 and it sets the fixed Baud Rate as 9600 bit/s. When connecting Cable, it has to cross Cables of RX,TX of MCU in order to connect with TX,RX of Board ET-Touch PAD, respectively.
- Page 17 Interface 232TTL Figure 5.9 shows how to connect circuit to read Key Code as ASCII of Board MCU and ET-TOUCH PAD 4x4 V2 (TTL). Ex2_Read_ASCII_ShifKey: This example illustrates how to read Key Code as ASCII. It presses Key F together with another Key and it uses Interrupt to setup interval of receiving data.
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Page 18: Pcb Layout
CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER PCB LAYOUT 13.2mm 16.6mm 16.6mm 10mm 3.3mm 76.2mm Dielectric-2mm Under Side 38.1mm PCB LAY OUT www.etteam.com... - Page 19 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER ET-TOUCH PAD 4x4 V2 Sheet1 www.etteam.com...
- Page 20 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER ET-TOUCH PAD 4x4 V2 Sheet2 www.etteam.com...
- Page 21 CLEAR Manual of Board ET-TOUCH PAD 4x4 V2 SHIFT HELP ENTER ET-TOUCH PAD 4x4 V2 Sheet3 www.etteam.com...
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