The Capacitive Touchpad Application Library provides details on touch key application solutions based on microcontroller device. eKTF5608 provide three operation mode: Active mode (AM) / Low Active Mode (LAM) / Low Scan Mode (LSM). It can apply on PCB and film material and support maximum 8 keys with waterproof function which can avoid error key status from water splashing. For function applications, the system provides I2C slave protocol to commute with host device. Users can get key status and set command using I2C. Additionally, eKTF5608 also supports SPI and UART communication. The Library supports capacitive touch key with plastic or glass substrate, and the maximum cover thickness is 8 mm. eKTF5608 touch function has more wide range parameter auto-calibration. It can be suitable for current environment when VDD on, and adjustment mechanism will run when environment varies. eKTF5608 has 2 channel 12 bits AD converters, Internal watch-dog timer and multi-level LVD detector which can ensure system stability. In addition to Flash ROM, eKTF5608 has internal 128 bytes EEPROM for customer use.