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OVERVIEW
The S3C7335 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, 4-channel A/D converter, 8-bit timer/counter, watch timer and PLL frequency synthesizer, it offers you an excellent design solution for a wide variety of applications that require LCD functions and audio applications .
Up to 56 pins of the 80-pin QFP package, it can be dedicated to I/O. Eight vectored interrupts provide fast response to internal and external events. In addition, the S3C7335's advanced CMOS technology provides for low power consumption and a wide operating voltage range.

OTP
The S3C7335 microcontroller is also available in OTP (One Time Programmable) version, S3P7335. The S3P7335 6 microcontroller has an on-chip 16-Kbyte one-time-programmable EPROM instead of masked ROM. The S3P7335 6 is comparable to S3C7335, both in function and in pin configuration.

• Memory
  - 512-nibble RAM
  - 16K-byte ROM
• I/O Pins
  - Input only: 4 pins
  - Output only: 28 pins
  - I/O: 24 pins
• LCD Controller/Driver
  - Maximum 14-digit LCD direct drive capability
  - 28 segment x 4 common signals
  - 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 functions
  - Watch-dog timer function
• 8-Bit Timer/Counter
  - Programmable 8-bit timer
  - External event counter
  - Arbitrary clock frequency output
  - External clock signal divider
  - Serial I/O interface clock generator
• Watch Timer
  - Time interval generation : 0.5 s, 3.9 ms at 32.768 kHz
  - Frequency outputs to BUZ pin
  - Clock source generation for LCD
• 8-Bit Serial I/O Interface
  - 8-bit transmit/receive mode
  - 8-bit receive mode
  - Data direction selectable (LSB-first or MSB-first)
  - Internal or external clock source
• A/D Converter
  - 4-channels with 8-bit resolution
• Bit Sequential Carrier Buffer
  - Support 16-bit serial data transfer in arbitrary format
• PLL Frequency Synthesizer
  - Level = 300 mVp-p (min)
  - AMVCO range = 0.5 MHz to 30 MHz
  - FMVCO range = 30 MHz to 150 MHz
• 16-Bit Intermediate Frequency (IF) Counter
  - Level = 300 mVp-p (min)
  - AMIF range = 100 kHz to 1 MHz
  - FMIF range = 5 MHz to 15 MHz
• Interrupts
  - Four internal vectored interrupts
  - Four external vectored interrupts
  - Two quasi-interrupts
• Memory-Mapped I/O Structure
  - Data memory bank 15
• Three Power-Down Modes
  - Idle: Only CPU clock stops
  - Stop1: Main system or subsystem clock stops
  - Stop2: Main system and subsystem clock stop
  - CE low: PLL and IFC stop
• Oscillation Sources
  - Crystal or ceramic oscillator for main system clock
  - Crystal for subsystem clock
  - Main system clock frequency: 4.5 MHz (Typ)
  - Subsystem clock frequency: 32.768 kHz (Typ)
  - CPU clock divider circuit (by 4, 8, or 64)
• Instruction Execution Times
  - 0.9, 1.8, 14.2 ms at 4.5 MHz
  - 122 ms at 32.768 kHz (subsystem)
• Operating Temperature
  - -25 °C to 85 °C
• Operating Voltage Range
  - 1.8 V to 5.5 V at 3MHz
  - PLL/IFC operation: 2.5V to 3.5V or 4.0V to 5.5V
• Package Type
  - 80-pin QFP