Industry’s Lowest Power SubGHz wireless communication MCU


The RL78/G1H microcontroller supports IEEE802.15.4e/g and has industry’s lowest power consumption - min. 5.8 mA (3.3 V) at Stand-by mode in RF receipt. The balun circuit and filter circuit make the antenna circuit design easy. And it can be reduced external parts for cost reduction. It can be reduced CPU load and can be made easy development by built-in hardware functions for IEEE802.15.4e/g compliant especially Wi-SUN.

We also offer transceiver RAA604S00 conforming to IEEE802.15.4e/g that can be used in combination with microcontroller.  (The document is here.)


Key Features:

Part Name R5F11FLJ R5F11FLK R5F11FLL
Memory Program Flash
256 KB 384 KB 512 KB
Data Flash 8 KB
SRAM 24 KB 32 KB 48 KB
System Clock 32 MHz (max.)
Clock Circuit High-speed system clock External main system clock input (EXCLK) 
1 - 20 MHz: VDD = 2.7 - 3.6 V, 
1 - 16 MHz: VDD = 2.4 - 3.6 V, 
1 - 8 MHz: VDD = 1.8 - 3.6 V
High Speed On-chip oscillator 1 MHz - 32 MHz (High speed main mode : 2.7 V - 3.6 V) 
1 MHz - 16 MHz (High speed main mode : 2.4 V - 3.6 V) 
1 MHz - 8 MHz (Low speed main mode : 1.8 V to 3.6 V)
Subsystem clock XT1 (Crystal) oscillation, External main system clock input (EXCLKS)  32.768 kHz (TYP.)
RF Reference clock 48 MHz (TYP.)
RF slow clock External clock input for RF block (EXSLK_RF) 32.768 kHz (TYP.)
Low Speed On-chip Oscillator 15 kHz (TYP.)
I/O port Total 41  (CMOS I/O : 26, CMOS input : 5, CMOS output : 1,  N-ch O/D I/O : 4, GPIO (RF block) : 5)
SubGHz RF Transceivers Operating Frequency Band 863MHz - 928MHz
Modulation scheme / Data rate (kbps) 2FSK/GFSK : 10/20/40/50/100/150/200/300 4FSK/GFSK : 200/400
Quiescent current (RF portion) Vcc=3.3V, typ. RX:6.3mA, RX wait:5.8mA / TX:20mA(+10dBm)
Receiving sensitivity -114dBm (GFSK 10Kbps, BER < 0.1% )
-105dBm (GFSK 100Kbps, BER < 0.1%)
Wireless circuit design support Receiver balun and matching circuit Transmitter balun and secondary/tertiary harmonic filter PLL filter VCO frequency auto-adjust function
Support IEEE802.15.4e/g Dual Sub-GHz Communication filtering, Transmission frame auto-generation function,
*Preamble length: 4 – 1000 Bytes can be set, Auto ACK Reply / Reception function support
Timer 16-bit timer 9 channels, PWM output x 1
Watchdog timer 1 channel
Real-time clock (RTC) 1 channel
12-bit interval timer 1 channel
Clock output/buzzer output 2
- 2.44 kHz, 4.88 kHz, 9.76 kHz, 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz  (Main system clock: fMAIN = 20 MHz operation)
- 256 Hz, - 256 Hz, 512 Hz, 1.024 kHz, 2.048 kHz, 4.096 kHz, 8.192 kHz, 16.384 kHz, 32.768 kHz  (Subsystem clock: fSUB = 32.768 kHz operation)
10-bit resolution A/D converter 6 channels
Serial interface CSI/UART 2 channel
CSI 1 channel (dedicated for internal communications)
I2C Bus 2 channel
Interrupt External : 7 
DTC 21 Factor
Voltage detector Rising edge : 1.88 V - 3.13 V (10 stages)  Falling edge : 1.84 V - 3.06 V (10 stages)
On-chip debug function Provided
Power supply voltage range 1.8 - 3.6 V
Operating ambient temperature TA = -40 ℃ to 85 ℃
Pin-Count 64-pins HVQFN 9 x 9 mm (0.5 mm pitch)

Pin Count / Memory Size Lineup:

Program Flash



Block Diagram:




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Software Design Support

Title Description
e² studio This integrated development environment (IDE) is based on the popular combination of the open-source Eclipse IDE and its CDT plug-in that enables C/C++ language development.
CS+ This integrated development environment (IDE) can be used for coding, assembly, compiling, and simulation. CS+ is also included with starter kits.
E2 emulator Lite This entry-level on-chip debugging emulator provides functionality equivalent to that of the E1 emulator at a low price.
E2 emulator This on-chip debugging emulator has advanced features that improve the efficiency of development. In addition to the basic functions from debugging to flash programming, this emulator supports hot plug-in and external triggers as standard items. This emulator also helps to reduce development time by downloading at high speeds (compared to the E1 emulator) and the ability to work in combination with various solutions such as the tuning of current drawn by systems under development.
E1 emulator This on-chip debugging emulator is a standard model which provides basic debugging functions (production is to be discontinued at the end of December 2019).


Hardware Design Support

Title Description
Oscillation circuit characteristics The resonators for which the operation is verified and their oscillator constants are shown below.

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