The S3C9404/C9414 single-chip 8-bit microcontroller is fabricated using an advanced CMOS process. It is built around the powerful SAM87Ri CPU core. The S3C9404/C9414 is a versatile microcontroller, with its A/D converter and a zero-crossing detection capability it can be used in a wide range of general purpose applications. Stop and Idle power-down modes were implemented to reduce power consumption. To increase on-chip register space, the size of the internal register file was logically expanded. The S3C9404/C9414 has 4-Kbytes of program memory on-chip (ROM) and 208-bytes of general purpose register area RAM. Using the SAM87Ri design approach, the following peripherals were integrated with the SAM87Ri core: -- Four configurable I/O ports (S3C9404: 22 pins, S3C9414: 16 pins) -- Six interrupt sources with one vector and one interrupt level -- Two 8-bit timer/counter with various operating modes -- Analog to digital converter (S3C9404: 8-bit, 8-channel, S3C9414: 10-bit, 5-channel) -- One zero cross detection module The S3C9404/C9414 microcontroller is ideal for use in a wide range of electronic applications requiring simple timer/counter, PWM, ADC, ZCD and capture functions. S3C9404 is available in a 30-pin SDIP and a 32-pin SOP package. S3C9414 is available in a 24-pin SDIP and a 24-pin SOP package. OTP