Bluetooth® low energy microcontrollers for smart connectivity, with the lowest level of current consumption in the industry. Compact module with built-in 32 MHz crystal resonator for RF chip and antenna (already certified) is also available.
RL78/G1D microcontrollers support Bluetooth® low energy and realized the lowest level of current consumption in the industry at 4.3 mA RF transmission current (0 dBm output) and 3.5 mA RF receiving current. Since circuit elements necessary for connecting an antenna are built in, not only does this simplify circuit design for the antenna connection, but it also helps reduce the cost of the end product because external parts are not needed. The software stack also supports wireless updating of software, helping to make maintenance of user software more efficient.
The RL78/G1D module contains the RL78/G1D, a 32 MHz crystal resonator for RF chip, and an antenna, all in a compact (8.95 x 13.35 x 1.7 mm) module. Moreover, the module inherits the functional pins of the RL78/G1D, so not only can you use it for modem configuration, but you can also leverage the strengths of the microcontroller for embedded configuration. The module has obtained Radio Law (Japan, FCC, IC, and CE) and Bluetooth SIG certification.
※ The RL78/G1D module is incorporated with a 32 MHz crystal oscillator for RF chip and an antenna.
|Memory||Program Flash||128 KB||192 KB||256 KB||256 KB|
|Data Flash||8 KB|
|SRAM||12 KB||16 KB||20 KB||20 KB|
|CPU||RL78 CPU Core|
|System Clock (RF Side)||32 MHz|
|Clock Circuit||High-speed system clock||External main system clock input (EXCLK)
1 to 20 MHz: VDD = 2.7 to 3.6 V,
1 to 16 MHz: VDD = 2.4 to 3.6 V,
1 to 8 MHz: VDD = 1.8 to 2.7 V,
1 to 4 MHz: VDD = 1.6 to 1.8 V
|High Speed On-chip oscillator||1 MHz to 32 MHz (High speed main mode : 2.7 V to 3.6 V)
1 MHz to 16 MHz (High speed main mode : 2.4 V to 3.6 V)
1 MHz to 8 MHz (Low speed main mode : 1.8 V to 3.6 V)
1 MHz to 4 MHz (Low voltage mode : 1.6 V to 3.6 V)
|Subsystem clock||XT1 (Crystal) oscillation, External main system clock input (EXCLKS)
32.768 kHz (TYP.)
|RF slow clock||External clock input for RF block (EXSLK_RF) 32.768 kHz (TYP.),
On-chip Oscillator 32.768 kHz (TYP.)
|Low Speed On-chip Oscillator||15 kHz (TYP.)|
|I/O port||Total 32
(CMOS I/O : 20, CMOS input : 5, CMOS output : 1,
N-ch O/D I/O : 2, GPIO (RF block) : 4)
(CMOS I/O : 21, CMOS output : 3)
|2.4 GHz RF Transceiver||Supporting Bluetooth v4.2 Specification (Single mode).
2.4 GHz ISM Band, GFSK modulation, TDMA/TDD frequency hopping
(Including AES encryption circuit.)
Adaptable function, exclusively for use in operation as a slave device
|Timer||16-bit timer||8 channels|
|Watchdog timer||1 channel|
|Real-time clock (RTC)||1 channel|
|12-bit interval timer||1 channel|
|Timer output||8 channel (PWM outputs:7) (If setup PIORO=1)|
|RTC output||1 channel : 1 Hz (subsystem clock: fSUB = 32.768 kHz)|
|Clock output/buzzer output||1|
|- 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, 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)
|8/10-bit resolution A/D converter||8 channels|
|Serial interface||CSI/simplified I2C/UART||1 channel|
|CSI/simplified I2C||1 channel|
|CSI||1 channel (dedicated for internal communications)|
|I2C Bus||1 channel|
|Interrupt||External : 4||External : 3|
|Voltage detector||Rising edge : 1.67 V to 3.13 V (12 stages)
Falling edge : 1.63 V to 3.06 V (12 stages)
|On-chip debug function||Provided|
|Power supply voltage range||1.6 to 3.6 V (VDD =1.8 to 3.6 V on usage of DC-DC converter)|
|Operating ambient temperature||TA = -40 ℃ to 85 ℃||TA = -25 ℃ to +75 ℃|
|Pin-Count||48-pins WQFN 6 x 6 mm (0.4 mm pitch)|
Pin Count / Memory Size Lineup:
You can find an explanation of orderable part numbers here.
Resources for Software and Hardware
|My Renesas||Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.|
|e-learning||Information for studying and learning about microcontrollers and microprocessors.|
|FAQ||Frequently asked questions and useful hints for development.|
|Forum||A forum and community site to share technical information, questions and opinions with others who use Renesas products.|
Software Design Support
|Web Simulator||RL78/G1D Web Simulator supporting initial evaluation for development now available|
|CS+||An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)|
|e2 studio||Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project.|
|E1||A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)|
Hardware Design Support
|Oscillation circuit characteristics||The resonators for which the operation is verified and their oscillator constants are shown below.
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