Low power 16-bit LCD microcontroller with rich analog integration.


The ultra low power RL78/L1A microcontroller family with embedded LCD has enhanced analog peripherals such as 12bit A/D converters, 12bit D/A converters, comparators, high accurate rail to rail OPAMPs with switch fabrics and comes with memory up to 128Kbyte Flash.

Using the smart  features like DTC and ELC a lot of peripherals can be connected internally to reduce CPU workload and can save overall power consumption.

Available in 80pin and 100pin LFQFP packages this MCU line has been developed especially for healthcare Bio-sensing applications such as blood glucose meter, but is suitable for many other appliances which needs low power with LCD and rich analog peripherals.


Main Solutions

Key Features:

Pin Count 80pin 100pin
Part Name R5F11MMx (X = D, E, F) R5F11MPx (X = E,F,G)
Program Flash 48 KB/64 KB/96 KB 64 KB/96 KB/128 KB
Data Flash memory 8 KB 8 KB
Main System Clock High Speed System Clock 1 to 20MHz : Vdd = 2.7 to 3.6V 1 to 8MHz : Vdd = 1.8V to 2.7V
High speed On-chip Oscillator HS mode : 1 to 24 MHz (Vdd = 2.7V to 3.6V)
HS mode : 1 to 16 MHz (Vdd = 2.4V to 3.6V)
LS mode : 1 to 8 MHz (Vdd = 1.8 to 3.6V)
Sub System Clock 32.768 kHz (TYP) : Vdd = 1.8 to 3.6V
Low Speed On-chip Oscillator 15 kHz (TYP) : Vdd = 1.8 to 3.6V
I/O port 59 79
Timers 16bit Timer  TAU 8 channels (Timer output x 8, PWM output x 7)
(7 x PWM,. interval timer, External event count, delay counter)
12bit Interval Timer 1 channel (low power timer, usable also in STOP, HALT mode)
8/16-bit interval timer 2 channels (8 bit)/1 channels (16 bit)  (cascadable low power timer, usable also in STOP, HALT mode to create long sleep intervals
Real time clock (RTC) 1 channel (calendar for 99 years, alarm function, and clock correction function)
Real Time Clock Out 1 channel, 1Hz (Sub System Clock : fsub = 32.768kHz)
17bit Watch Dog Timer 1 channel
Clock output / Buzzer output 2 channels
12bit A/D converter 10 channels 14 channels
12bit D/A converter 2 channels 2 channels
Operation Amplifier Rail to Rail OpAMP w/ MUX 2 channels x 2 MUX 2 channels x 4 MUX
General Purpose 1 channel 1 channel
Comparator 1 channel 1 channel
Serial Communication Interface CSI (SPI) : 1 channel /  UART : 1 channel / Simple I2C : 1 channel
CSI : 1 channel / UART : 1 channel / Simple I2C : 1 channel
CSI : 1 channel / UART : 1 channel / Simple I2C : 1 channel
CSI : 1 channel / UART : 1 channel / Simple I2C : 1 channel
I2C bus 1 channel
LCD controller Segment 32 (28) 45 (41)
Common 4 (8)
Data Transfer Controller 30 sources
Event Link Controller Event : 22, Event  trigger: 8
Key Interrupt 8
Power On Reset Power on reset : 1.51V +/- 0.04V
Power down reset  : 1.50 +/- 0.04V
Low Voltage Detector Rising : 1.88V to 3.13V
Falling : 1.84V to 3.06V
On-chip debugging Yes
Power Supply Voltage Vdd = 1.8V to 3.6V
Operation Temperature Range Ta = -40℃ to +85℃

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
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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