High performance, low power key matrix scanner

摘要: An improved method and apparatus for scanning a keyboard matrix that reduces the amount of time needed to scan thereby significantly power operate associated circuitry over an extended period time. A switch having plurality rows columns is operably connected wireless interface device use with wirelessly enabled host. Switch transition operable generate output signal upon detection in voltage level at least one row from first state second state. Control latch by circuitry. Scan logic scans matrix, wherein circuit detects operation testing all latched high