KS56C220
Samsung 4-Bit Singlechip Controller vom Typ S3C7 mit 2K ROM und 288 a 4 Bit RAM.
General Description
The S3C7 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 watch timer, the S3C7 offers an excellent design solution for a wide variety of applications that require LCD functions.
Features
Memory - 288 x 4-bit RAM - 2048 x 8-bit ROM or - 4096 x 8-bit ROM Oscillation Sources - Crystal, ceramic, or RC for main system clock - Crystal or external oscillator for subsystem clock - Main system clock frequency: 4.19 MHz (typical) - Subsystem clock frequency: 32.768 kHz - CPU clock divider circuit (by 4, 8, or 64) Instruction Execution Times - 0.95, 1.91, 15.3µs at 4.19 MHz (main) - 122µs at 32.768 kHz (subsystem) Operating Voltage Range - 2.0 V to 5.5 V at 4.19 MHz - 1.8 V to 5.5 V at 3 MHz