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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


5.5 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




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


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


32 (28)

45 (41)


4 (8)

Data Transfer Controller

30 sources

Event Link Controller

Event : 22, Event  trigger: 8

Key Interrupt


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:

Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

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FAQ Frequently asked questions and useful hints for development.
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Software Design Support

Title Description
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

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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