RL78/G1H CHAPTER 18 RF TRANSCEIVER
R01UH0575EJ0120 Rev. 1.20 Page 545 of 920
Dec 22, 2016
18.1 RF Transceiver Overview
RF transceiver supports 2FSK/GFSK and 4FSK/GFSK modulations with lower power consumption, and
corresponds to the operation within the frequency band between 863 MHz and 928 MHz.
This transceiver is best suited to the applications used for smart meter (electricity, gas, tap water) supporting
products, HEMS controller, wireless sensor network, and others.
The features of the transceiver function are described below.
•Features:
Low power consumption
• RF receiving current: 6.9 mA
(TYP) @3.0 V, 100 kbps, 2FSK/at STOP mode of MCU
• RF transmission current: 21 mA
(TYP) @3.0 V, 100 kbps, 2FSK, +10 dBm/at STOP mode of MCU
Transceiver:
• RF frequency range: 863 to 928 MHz
• Modulation method: 2FSK/GFSK, 4FSK/GFSK
•Data rate:
2FSK/GFSK; 10 kbps to 300 kbps
4FSK/GFSK; 200 kbps/400 kbps
• Forward Error Correction (FEC) function
MAC:
• 32-bit timer function
• Transmission RAM/Receiving RAM: both 256 bytes
• 16-bit/32-bit auto CRC function
• Address filter & auto ACK reply function
• Antenna diversity function
• Auto CSMA-CA function
Caution Registers described in this section are assigned in memory area dedicated to RF transceiver.
These registers are controlled by MCU unit through serial interface.
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