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The S3C72N2/C72N4 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 S3C72N2/C72N4 offers an excellent design solution for a wide variety of applications that require LCD functions.
Up to 16 pins of the 64-pin QFP package, it can be dedicated to I/O. Four vectored interrupts provide fast response to internal and external events. In addition, the S3C72N2/C72N4 's advanced CMOS technology provides for low power consumption and a wide operating voltage range.

OTP
The S3C72N2/C72N4 microcontroller is also available in OTP (One Time Programmable) version, S3P72N4 . The S3P72N4 microcontroller has an on-chip 4-Kbyte one-time-programmable EPROM instead of masked ROM. The S3P72N4 is comparable to S3C72N2/C72N4, both in function and in pin configuration.

• Memory
  - 288 X 4-bit RAM
  - 2048 X 8-bit ROM (S3C72N2)
  - 4096 X 8-bit ROM (S3C72N4)
• I/O Pins
  - Input only: 4 pins
  - I/O: 12 pins
  - Output: 8 pins sharing with segment driver outputs
• LCD Controller/Driver
  - Maximum 16-digit LCD direct drive capability
  - 32 segment, 4 common 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)
• 8-Bit Basic Timer
  - Programmable interval timer
  - Watchdog timer
• 8-Bit Timer/Counter
  - Programmable 8-bit timer
  - External event counter
  - Arbitrary clock frequency output
• Watch Timer
  - Real-time and interval time measurement
  - Four frequency outputs to BUZ pin
  - Clock source generation for LCD
• Bit Sequential Carrier
  - Support 16-bit serial data transfer in arbitrary format
• Interrupts
  - Two internal vectored interrupts
  - Two external vectored interrupts
  - Two quasi-interrupts
• Memory-Mapped I/O Structure
  - Data memory bank 15
• Two Power-Down Modes
  - Idle mode (only CPU clock stops)
  - Stop mode (main or sub system oscillation stops)
• 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, 15.3 µs at 4.19 MHz (main)
  - 122 µs at 32.768 kHz (subsystem)
• Operating Temperature
  - - 40°C to 85°C
• Operating Voltage Range
  - 2.0 V to 5.5 V at 4.19 MHz
  - 1.8 V to 5.5 V at 3 MHz
• Package Type
  - 64-pin QFP