The devices include an integrated BCD code-B/HEX decoder, multiplex scan circuitry, segment and display drivers, and a 64-bit memory. Internal memory stores the shift register settings, eliminating the need for continuous device reprogramming. All outputs of the AS1115 can be configured for key readback. Key-switch status is obtained by polling for up to 64 keys while 16 keys can be used to trigger an interrupt. Additionally the AS1115 offers a diagnostic mode for easy and fast production testing. The AS1115 features a low shutdown current of typically 200nA, and an operational current of typically 350A. The number of digits can be programmed, the devices can be reset by software, and an external clock is also supported.