Microcontrollers for brushless DC motor with built-in comparator for stopping rotation when abnormality detected, PGA, and 8-bit D/A converter.


RL78/G1G microcontrollers have a three-phase complementary PWM timer for brushless DC motor control, a comparator for stopping motor rotation when overcurrent is detected and its 8-bit D/A converter for reference voltage, and a PGA (Programmable Gain Amplifier) for controlling amplification factor by software. The number of components can be reduced. The comparator is over eight times faster than that of previous products, and high-speed overcurrent detection can be performed. Built-in safety features (functions that detect illegal hardware operation) make it possible to satisfy the European home appliance safety standard (IEC 60730). The 0.8-mm pitch QFP lineup also helps reduce solder mounting expenses.


Main Solutions

Key Features:

Pin Count 30-pin 32-pin 44-pin
Part Name R5F11EA8ASP
Program Flash 8 KB to 16 KB
Main System Clock High-speed system clock X1 (crystal/ceramic) oscillation, external main system clock input (EXCLK)
1 to 20 MHz: VDD = 2.7 to 5.5 V
High-speed on-chip oscillator clock 1 to 24 MHz (VDD = 2.7 to 5.5 V)
Low-speed on-chip oscillator clock 15 kHz (TYP.): VDD = 2.7 to 5.5 V
I/O Port Total 26 28 40
CMOS I/O 23 25 35
CMOS input 3 3 5
Timer 16-bit timer TAU 4 channels, PWM output x 3
Timer RJ 1 channel
Timer RD 2 channels, PWM output x 6
Watchdog timer 1 channel
12-bit interval timer 1 channel
Timer output Timer outputs: 14 channels, PWM outputs: 9 channels
Clock output/buzzer output 2 (2.44 kHz, 4.88 kHz, 9.77 kHz, 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz (Main system clock : fMAIN = 20 MHz operation))
8/10-bit resolution A/D converter 8 channels 12 channels
Comparators 2 channels
PGA 1 channel
Serial interface CSI: 1 channel/UART0: 1 channel/simplified I2C: 1 channel UART1: 1 channel
Event link controller (ELC) Event input: 18
Event trigger output: 6
Event input: 19
Event trigger output: 6
Vectored interrupt Internal 20  
External 6 7
Key interrupt - 4
Power-on-reset circuit Power-on-reset: 1.51 ±0.03 V, Power-down-reset: 1.50 ±0.03 V
Voltage detector 2.75 V to 4.06 V (6 stages)
On-chip debug function Provided
Power supply voltage VDD = 2.7 to 5.5 V
Operating ambient temperature TA = -40 to +85°C
Current consumption STOP mode : 240 nA
HALT mode : 145 uA (LS mode) @ 8MHz, 3V
RUN : 3.9mA @ 24MHz, 3V

Pin Count / Memory Size Lineup:

Program Flash



Block Diagram:

You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

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e-learning Information for studying and learning about microcontrollers and microprocessors.
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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
Characteristics data Information on observed values. Please use this as reference data when developing your set.
Oscillation circuit characteristics The resonators for which the operation is verified and their oscillator constants are shown below.
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