The HT48R05A-1/HT48C05 and HT48R06A-1/ HT48C06 are 8-bit high performance, RISC architecture microcontroller devices specifically designed for cost-effective multiple I/O control product applications. The mask version HT48C05 and HT48C06 are fully pin and functionally compatible with the OTP version HT48R05A-1 and HT48R06A-1 devices.