1.1 Features

Ultra-low power consumption technology

? Standby function of MCU: HALT mode,

STOP mode, SNOOZE mode

? Standby function of RF unit: IDLE mode,

SLEEP mode

? Current drawn by the RF transceiver during

transmission

: 21 mA (typ.) with a transfer rate of 100 kbps,

2GFSK as the modulation method, +10 dBm

of power, and the MCU operating at 3.0 V in

STOP mode

: 36 mA (typ.) with a transfer rate of 100 kbps,

2GFSK as the modulation method, +13 dBm

of power, and the MCU operating at 3.0 V in

STOP mode

? Current drawn by the RF transceiver during

reception

: 6.9 mA (typ.) with a transfer rate of 100 kbps,

2GFSK as the modulation method, and the

MCU operating at 3.0 V in STOP mode

? Current drawn by the RF transceiver in SLEEP

mode (POWER DOWN mode)

: 0.1 μA (typ.) with the MCU operating at 3.0 V

in STOP 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

operation with high-speed on-chip oscillator) to

ultra-low speed (30.5 μs: @ 32.768 kHz operation

with subsystem clock)

? Address space: 1 MB

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

banks

? On-chip RAM: 24 to 48 KB