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16 Key Touch Keypad Module for Arduino(ME073)
Description:
This 16 key capacitive touch key pad is ba s ed on the TTP229 capacitive s ensor with accurate
sensing of up to 16 points. Using this keypad provides a solid state alternative to mechnical
type keypads providing the advantage of greater durability especially in dusty environments.
They kaypad can also be configured in different modes providing various key group options
upto 16 independent keys. Outs 1 to 8 on the header connector mimic the sates of the first 8
keys. When is 16 key mode the state of all 16 keys can be read via its 2 wire serial interface.
Please see out example Arduino sketch or datasheet for more information on how read the
key states via the serial int er face.
www.openplatform.cc
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Specification:
• Chip: TTP229
• Operating voltage2.4V~5.5V
• Built-in regulator
• Stand-by current At 3V, an d sleep mode slow sampling rate 8Hz
• Typical 2.5uA for 16 input keys
• Ty pical 2.0uA for 8 i nput keys
• 8 Key or 16 key modes
• Separate outputs to 8 key s in 8 key mo de
• 2 wires serial output interf ace f or bot h 16 key and 8 key mode
• Outputs can be set to CMOS/OD/OC with active high/low
• 2 Wires serial interface can select active high or low by option
• Optional Multi-key or single-key
• Provides two kinds of sampling rate: slow sampling rate 8Hz and fast sampling rate
64Hz at sleep mode
• Optional maximum key-on time about 80sec
• Auto calibration at power up (keypad mu st not be touched for 0. 5 seconds aft er power
up)
• Auto calibration for changes in environment
• Size: 65mm x 50mm
Note: By default the keypad is in 8 key mode. To configure it to 16 key mode you will need to
link pads TP2 togeth er like below.
www.openplatform.cc
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