Samsung‘s S3C8-series of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU， a wide range of integrated peripherals， and various mask-programmable ROM sizes. The major CPU features are： — Efficient register-oriented architecture — Selectable CPU clock sources — Idle and Stop power-down mode released by interrupt or reset — Built-in basic timer with watchdog function A sophisticated interrupt structure recognizes up to eight interrupt levels. Each level can have one or more interrupt sources and vectors. Fast interrupt processing （within a minimum of four CPU clocks） can be assigned to specific interrupt levels. The S3C8238/C8235/F8235 single-chip CMOS microcontrollers are fabricated using the highly advanced CMOS process， based on Samsung’s latest CPU architecture. The S3C8235 is a microcontroller with a 16K-byte mask-programmable ROM embedded. The S3F8235 is a microcontroller with a 16K-byte Flash ROM embedded. Using a proven modular design approach， Samsung engineers have successfully developed the S3C8238/C8235/F8235 by integrating the following peripheral modules with the powerful SAM8 core： — Five programmable I/O ports， including three 8-bit ports and two 4-bit ports， for a total of 32 pins. — Eight bit-programmable pins for external interrupts. — One 8-bit basic timer for oscillation stabilization and watchdog function （system reset）。 — Two 8-bit timer/counter and one 16-bit timer/counter with selectable operating modes. — Watch timer for real time — 8-channel A/D converter The S3C8238/C8235/F8235 is versatile microcontroller for camera， LCD and ADC application， etc. They are currently available in 64-pin LQFP， 64-pin QFP and 64-pin SDIP package.