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
– Flash read/program/erase over full operating voltage and temperature
– Random-access memory (RAM)
– Security circuitry to prevent unauthorized access to RAM and flash contents
• Power-Saving Modes
– Two low power stop modes
– Reduced power wait mode
– Low power run and wait modes allow peripherals to run while voltage regulator is in standby
– Peripheral clock gating register can disable clocks to unused modules, thereby reducing currents
– Very low power external oscillator that can be used in stop2 or stop3 modes to provide accurate clock source to real time counter
– 6 μs typical wake-up time from stop3 mode
• Clock Source Options
– Oscillator (XOSC) — 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 or external reference; precision trimming of internal reference allows 0.2% resolution and 2% deviation over temperature and voltage; supporting 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 warning with interrupt
– Low-voltage detection with reset or interrupt
– Illegal opcode detection with reset
– Illegal address detection with reset
– Flash block protection