Features
. The custom code consists of 7 bits to be fixed by the on-chip ROM and 6 bits being pin-settable. Sixty-four custom codes may be selected externally (no diode required).
. Minimum number of external parts required

Functions
. 32+3 function keys
. 13-bit custom codes
. Operating supply voltage range VDD = 1.8 to 3.6 V
. Supply current at the standby mode IDD = 1 µA or less
. Double-press operation keys (no priority given)
. On-chip oscillator (ceramic resonator : connected externally)