Features:
• 8-Bit RS08 Central Processor Unit (CPU)
– Up to 20 MHz CPU at 1.8 V to 5.5 V across temperature
range of –40°C to 85°C
– Subset of HC08 instruction set with added BGND
instruction
• On-Chip Memory
– 8 KB flash read/program/erase over full operating
voltage and temperature; KA4 has 4 KB flash
– 254 byte random-access memory (RAM); KA4 has 126
byte RAM
– Security circuitry to prevent unauthorized access to
RAM and flash contents
• Power-Saving Modes
– Wait and stop
– Wakeup from power-saving modes using real-time
interrupt (RTI), KBI, or ACMP
• Clock Source Options
– Oscillator (XOSC) — Loop-Control Pierce oscillator;
crystal or ceramic resonator range of 31.25 kHz to
39.0625 kHz or 1 MHz to 5 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;
supports bus frequencies up 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
– 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
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