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S3C8-SERIES MICROCONTROLLERS
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.

S3C8235B/F8235B MICROCONTROLLER
The S3C8235B/F8235B single-chip CMOS microcontrollers are fabricated using the highly advanced CMOS process, based on Samsung's latest CPU architecture.
The S3C8235B is a microcontroller with a 16K-byte mask-programmable ROM embedded.
The S3F8235B is a microcontroller with a 16K-byte Flash ROM embedded.
Using a proven modular design approach, Samsung engineers have successfully developed the S3C8235B/F8235B 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 S3C8235B/F8235B is versatile microcontroller for camera, LCD and ADC application, etc. They are currently available in 64-pin LQFP and 64-pin QFP package.

• CPU
  - SAM88RC CPU core
• Memory
  - 552-byte internal register file (including LCD display RAM)
  - 16K-byte program memory
• Oscillation Sources
  - Crystal, Ceramic or RC for main clock
  - Crystal for sub clock (32.768 kHz)
  - CPU clock divider (1/1, 1/2, 1/8, 1/16)
• Instruction Set
  - 78 instructions
  - Idle and Stop instructions
• Instruction Execution Time
  - 500ns at fx = 8 MHz (minimum, main clock)
  - 122ms at fxt = 32.768 kHz (sub clock)
• Interrupts
  - 8 interrupt levels and 16 internal source
• 32 I/O Ports
  - 16 normal I/O pins
  - 16 pins sharing with LCD signals
• Timers and Timer/Counters
  - One programmable 8-bit basic timer (BT) for oscillation stabilization control or watchdog timer function
  - One 8-bit timer/counter (Timer A) with three operating modes; Interval mode, capture mode and PWM mode.
  - One 8-bit timer/counter (Timer B)
• Carrier frequency (or PWM) generator.
  - One 16-bit capture timer/counter (Timer 1) with two operating modes; Interval mode, Capture mode for pulse period or duty.
• Watch Timer
  - Interval Time: 3.19ms, 0.25s, 0.5s, 1.0s at 32.768 kHz
  - 0.5/1/2/4 kHz buzzer output selectable
• LCD Controller/Driver
  - 24 segments and 8 common terminals
  - 4 and 8 common selectable
  - Internal resistor circuit for LCD bias
• Analog to Digital Converter
  - 8-channel analog input
  - 10-bit conversion resolution
  - 25ms conversion
• Voltage Booster
  - LCD drive voltage supply
  - S/W control (Enable/Disable)
• Low Voltage Reset(LVR)
  - Low Voltage Check to make system reset
  - VLVR = 2.3V/2.8V/3.7V
• Pattern Generation Module
  - Pattern generation module triggered by timer match signal and S/W.
• Voltage Detector for Indication
  - Voltage Detector to indicate specific voltage.
  - S/W control (2.35V, 3.3V, 4.5V)
• Key Strobe Mode
  - Support automatic key strobe output with LCD driver(Maximum 4 x 12 key matrices)
• Two Power-Down Modes
  - Idle mode: only CPU clock stops
  - Stop mode: system clock and CPU stop
• Operating Temperature Range
  - -25°C to + 85°C
• Operating Voltage Range
  - 2.0 V to 5.5 V at 4 MHz (main clock)
  - 2.7 V to 5.5 V at 8 MHz (main clock)
  - 2.0 V to 5.5 V at 32.768 kHz (sub clock)
• Package Type
  - 64-QFP-1420F, 64-LQFP-1010
• Smart Option
  - Low Voltage Reset(LVR) level and enable/disable are at your hardwired option. (ROM address 3EH,3FH)