8-bit QA MCUs

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Block Diagram

Freescale S08QA Microcontroller Block Diagram

Freescale S08QA Microcontroller Block Diagram

Features

8-bit HCS08 Central Processor Unit (CPU)

  • Up to 20 MHz HCS08 CPU (10 MHz bus frequency) for 100 ns minimum instruction time
  • HC08 instruction set with added BGND instruction
  • Support for up to 32 interrupt/reset sources

Integrated Third-Generation Flash Memory and RAM

  • Embedded flash that is in-application reprogrammable over the full operating voltage and temperature range with a single power supply
  • Extremely fast, byte-writable programming; as fast as 20 us/byte
  • Up to 100,000 write/erase cycles at typical voltage and temperature (10k minimum write/erase)
  • 100 years typical data retention (15 years minimum)

Flexible Clock Options

  • Internal clock source (ICS) module containing a frequency-locked loop (FLL) controlled by internal or external reference
  • Precision trimming of internal reference allows typical 0.1 percent resolution and +0.5 percent to -1 percent deviation over operating temperature and voltage
  • Internal reference can be trimmed from 31.25 kHz to 39.065 kHz, allowing for 8 MHz to 10 MHz FLL output

Input/Output (I/O) Lines

  • 4 Bidirectional Input/Output (I/O) Lines
  • One Input Only and One Output Only Line
  • Outputs 10 mA each, 60 mA max for package
  • Software selectable pull-ups on ports when used as input
    • internal pull-up on reset
    • interrupt request (IRQ) pin
  • Software selectable slew rate control and drive strength on ports when used as output
  • 4-pin keyboard interrupt module with software selectable polarity on edge or edge/level modes

Integrated Analog Peripherals

  • 4-ch., 10-bit analog-to-digital converter (ADC)
  • Automatic compare function, software programmable for greater than/equal to or less than conditions
  • Asynchronous clock source
  • Temperature sensor
  • Internal bandgap reference channel
  • Hardware triggerable using the RTI counter
  • Low-power and high-speed options

Analog comparator module (ACMP)

  • Option to compare to internal reference
  • Option to route comparator output directly to pin
  • Output can be optionally routed to TPM module as Input capture trigger

Two Timer Modules

  • Programmable 16-bit timer/PWM module (TPM)
  • 8-bit modulo timer module (MTIM) with 8-bit prescaler

System Protection

  • Watchdog computer operating properly (COP) reset with option to run from dedicated 1 kHz internal clock source or bus clock
  • Low-voltage detection with reset or interrupt
  • Illegal opcode detection with reset
  • Flexible block protection
  • Security feature for flash and RAM
  • Always-on power-on reset (POR) circuitry

Design Resources

Documentation

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