S3C7235 Datasheet | Samsung Semiconductor

OVERVIEW OVERVIEW PRODUCT OVERVIEW The S3C7238/C7235 single-chip CMOS microcontroller has been designed for high performance using Samsung's newest 4-bit CPU core, SAM47 (Samsung Arrangeable Microcontrollers). With features such as LCD direct drive capability, 8-bit timer/counter, and serial I/O, the S3C7238/C7235 offer an excellent design solution for a wide variety of applications that require LCD functions. Up to 40 pins of the 80-pin QFP package can be dedicated to I/O. Six vectored interrupts provide fast response to internal and external events. In addition, the S3C7238/C7235's advanced CMOS technology provides for low power consumption and a wide operating voltage range. The S3C7238/C7235 microcontroller is also available in OTP (One Time Programmable) version, S3P7238/P7235. S3P7238/P7235 microcontroller has an on-chip 8/16-Kbyte one-time-programmable EPROM instead of masked ROM. The S3P7238/P7235 is parable to S3C7238/C7235, both in function and in pin configuration. 1-1 PRODUCT OVERVIEW S3C7238/P7238/C7235/P7235 FEATURES Memory - - - 512 × 4-bit RAM 8 K × 8-bit ROM (S3C7238/P7238) 16 K × 8-bit ROM (S3C7235/P7235) Bit Sequential Carrier - Support 16-bit serial data transfer in arbitrary format Interrupts - - - Three internal vectored interrupts Three external vectored interrupts Two quasi-interrupts I/O Pins - - - Input only: 8 pins I/O: 24 pins Output: 8 pins sharing with segment driver outputs Memory-Mapped I/O Structure - Data memory bank 15 LCD Controller/Driver - - - Maximum 16-digit LCD direct drive capability 32 segment, 4 mon pins Display modes: Static, 1/2 duty (1/2 bias), 1/3 duty (1/2 or 1/3 bias), 1/4 duty (1/3 bias) Two Power-Down Modes - - Idle mode (only CPU clock stops) Stop mode (main or sub system oscillation stops) 8-Bit Basic Timer - - Programmable interval timer Watchdog timer Oscillation Sources - - - - - Crystal, ceramic, or RC for main system clock Crystal or external oscillator for subsystem clock Main system...