A keypad is a set of buttons arranged in a block or "pad" which bear digits, symbols or alphabetical letters. Pads mostly containing numbers are called a numeric keypad. Numeric keypads are found on alphanumeric keyboards and on other devices which require mainly numeric input such as calculators, push-button telephones, vending machines, ATMs, Point of Sale devices, combination locks, and digital door locks. Many devices follow the E.161 standard for their arrangement.
C2-01 Nokia Keypad IC Jumper Ways Filter Problem Solution
This is Nokia C2-01-solution for not working keypads problem. This solution gives the paths connecting the C2-01 keyboard matrix including the EMI filter IC jumper ways. This may help to solve problems not simply a keyboard on the...
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