Features
• 8-Bit HCS08 Central Processor Unit (CPU)
   – Up to 20 MHz CPU at 3.6 V to 1.8 V across temperature range of –40 °C to 85 °C
   – HC08 instruction set with added BGND instruction
   – Support for up to 32 interrupt/reset sources
• On-Chip Memory
   – Up to 8 KB flash memory read/program/erase over full operating voltage and temperature
   – Up to 512 bytes random-access memory (RAM)
   – Security circuitry to prevent unauthorized access to RAM and flash contents
• Power-Saving Modes
   – Two very low power stop modes
   – Peripheral clock enable register can disable clocks to unused modules, thereby reducing currents
   – Low power run
   – Low power wait
   – 6 μs typical wakeup time from stop3 mode
   – Typical stop current of 250 nA at 3 V, 25 °C
• Clock Source Options
   – Oscillator (XOSC) — Very low-power, loop-control Pierce oscillator; crystal or ceramic resonator range of 31.25 kHz to 38.4 kHz or 1 MHz to 16 MHz
   – Internal Clock Source (ICS) — Internal clock source module containing a frequency-locked-loop (FLL) controlled by internal reference; precision trimming of internal reference allows 0.2% resolution and 2% deviation over temperature and voltage; supports bus frequencies from 1 MHz to 10 MHz
• 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; selectable trip points
   – Illegal opcode detection with reset
   – Illegal address detection with reset
   – Flash block protection
• Development Support
   – Single-wire background debug interface
   – Breakpoint capability to allow single breakpoint setting during in-circuit debugging
• Peripherals
   – ADC — 8-channel, 12-bit resolution; 2.5 μs conversion time; automatic compare function; 1.7 mV/°C temperature sensor; internal bandgap reference channel; operation in stop3; fully functional from 3.6 V to 1.8 V.
   – ACMP — Analog comparator with selectable interrupt on rising, falling, or either edge of comparator output; compare option to fixed internal bandgap reference voltage; output can be tied internally to TPM input capture; operation in stop3
   – TPM — One 1-channel timer/pulse-width modulator (TPM) module; selectable input capture, output compare, or buffered edge- or center-aligned PWM on each channel; ACMP output can be tied internally to input capture
   – MTIM — 8-bit modulo timer module with optional prescaler
   – RTC — (Real-time counter) 8-bit modulo counter with binary or decimal based prescaler; external clock source for precise time base, time-of-day, calendar or task scheduling functions; free running on-chip low power oscillator (1 kHz) for cyclic wakeup without external components; runs in all MCU modes
   – SCI — Full duplex non-return to zero (NRZ); LIN master extended break generation; LIN slave extended break detection; wakeup on active edge
   – KBI — 8-pin keyboard interrupt with selectable edge
and level detection modes
• Input/Output
   – 22 GPIOs and one input-only and one output-only pin.
   – Hysteresis and configurable pullup device on all input pins; configurable slew rate and drive strength on all output pins except PTA5.
• Package Options
   – 28-pin SOIC, 24-pin QFN, 16-pin TSSOP