Target applications

● Power, gas, and water meters

Ultra-low power consumption technology

● V DD = single power supply voltage of 1.6 to 5.5 V

● HALT mode

● STOP mode

● SNOOZE mode

RL78 CPU core

● CISC architecture with 3-stage pipeline

● Minimum instruction execution time: Can be changed from high speed (0.03125 µs: @ 32 MHz selection with high-

speed on-chip oscillator) to ultra-low speed (66.6 µs: @ 15 kHz operation with low-speed on-chip oscillator)

● 16-bit multiplication, 16-bit multiply-accumulation, and 32-bit division are supported.

● Address space: 1 MB

● General-purpose registers: (8-bit register × 8) × 4 banks

● On-chip RAM: 32 KB

Code flash memory

● Code flash memory: 512 KB (256 KB × 2 banks)

● Block size: 1 KB

● Prohibition of block erase and rewriting (security function)

● On-chip debug function

● Self-programming (with flash shield window function)

● Bank programming function: Enables updating of the user program while it is running.

Data flash memory

● Data flash memory: 2 KB

● Back ground operation (BGO): Instructions can be executed from the program memory while rewriting the data flash

memory

● Number of rewrites: 1,000,000 times (TYP.)

● Voltage of rewrites: V DD = 1.8 to 5.5 V