8-bit Cost-Effective FL16/8 MCUs

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Block Diagram

Freescale S08FL Microcontroller Block Diagram

Freescale S08FL Microcontroller Block Diagram


8-bit HCS08 Central Processing Unit (CPU)

  • Up to 10 MHz internal bus (20 MHz HCS08 core) frequency with 4.5V to 5.5V operation across temperature range of -40°C to +85°C

On-Chip Memory

  • Up to 16K flash read/program/erase across entire operating voltage and temperature ranges
  • Up to 1024 bytes random access memory (RAM)
  • Security circuitry

Power-Saving Modes

  • Two low-power stop modes, reduced-power wait mode

Clock Source Options

  • Oscillator (XOSC) clock source options include oscillator, crystal or ceramic resonator
  • Up to 20 MHz internal clock source (ICS) module


  • Interrupt priority controller (IPC)
  • Analog-to-digital converter (ADC)—12-channel, 8-bit resolution
  • Timer/pulse-width modulator module (TPM)— 1 x 4-channel and 1 x 2-channel
  • Timer/pulse-width modulator module (TPM)— 1 x 4-channel and 1 x 2-channel
  • SCI module with optional 13-bit break, LIN extensions


  • 30 general purpose input/output (GPIO) pins including one input-only pin and one outputonly pin

System Protection

  • Watchdog computer operating properly (COP) module can be reset with option to run from dedicated 1 kHz internal clock source or bus clock
  • Low-voltage detection with reset or interrupt, selectable trip points
  • Illegal opcode detection with reset
  • Illegal address detection with reset
  • Flash block protection

Development Support

  • Single-wire background debug interface
  • Breakpoint setting capability
  • On-chip in-circuit emulator (ICE) debug module containing two comparators and nine trigger points


Quick reference to our documentation types.

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Design Resources


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Note: For better experience, software downloads are recommended on desktop.

Engineering Services

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