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RL78/L12

Low power consumption, compact LCD microcontrollers suitable for small appliances and healthcare devices

 

RL78/L12 microcontrollers have a built-in segment LCD driver. Three LCD driving voltage generation methods (external resistance division, capacitive split, and internal voltage boost) are supported, corresponding to a variety of segment LCD panels. They realize low current consumption (*1): external resistance division: 1.60 μA (*2), internal voltage boost: 1.19 μA, and capacitive split: 0.68 µA. With a lineup of 32 to 64-pin products supporting up to 280 segments, these microcontrollers are perfect for small devices with built-in LCD panels such as small appliances and healthcare devices.

(Remarks)
(*1) Current (typ.) at 1/3 bias, subclock operation, HALT mode, and RTC operation
(*2) Registance value for external registance division = 1000 kΩ

 

Key Features:

ITEM Rl78/L12
Pin Count 32pins 44pins 48pins 52pins 64pins
Part Name R5F10RBx R5F10RFx R5F10RGx R5F10RJx R5F10RLx
Memory Program Flash 8 to 32 KB 16, 32 KB
Data Flash 2 KB
SRAM 1, 1.5 KB
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,
1 to 8 MHz:VDD = 1.8 to 2.7 V, 1 to 4 MHz:VDD = 1.6 to 1.8 V
Low speed system clock HS(high-speed main) mode: 1 to 24 MHz(VDD = 2.7 to 5.5 V),
HS(high-speed main) mode: 1 to 16 MHz(VDD = 2.4 to 5.5 V) ,
LS(low-speed main) mode: 1 to 8 MHz (VDD = 1.8 to 5.5 V) ,
LV(low-voltage main) mode: 1 to 4 MHz (VDD = 1.6 to 5.5 V)
Sub system clock - XT1(crystal) oscillation, external system clock input(EXCLKS) 32.768 kHz(TYP.):VDD = 1.6 to 5.5 V
Low speed on-chip oscillator Internal oscillation
15 kHz(TYP.):VDD = 1.6 to 5.5 V
I/O port Total 20 29 33 37 47
CMOS I/O 15 22 26 30 39
CMOS input 3 5
CMOS output - 1
N-ch open Drain I/O (EVDD) 2
Pins only for LCD drive 8 11
LCD driver/controller   Internal voltage boosting method, capacitor split method, and external
resistance division method are switchable.
Segment signals 13 22(18) 26(22) 30(26) 39(35)
Common signals 4 4(8)
Timer 16-bit timer 8 channels 8 channels (Remote control output 1 channel)
Watchdog timer 1 channel
Real Time Clock
(RTC)
1 channel
12-bit interval timer (IT) 1 channel
Timer output 4 (PWM:3) 5 (PWM:4) 6 (PWM:5) 8 (PWM:7)
RTC output - 1 channel : 1 Hz (Sub system clock: fSUB = 32.768 kHz)
8/10-bit A/D converter 4 channels 7 channels 9 channels 10 channels
Serial interfaces CSI 2ch/UART(LIN-Bus support) 1 channel
I2C-bus 1 channel
DMA controller 2 channels
Vector interrupt source Internal 23
External 4 6 7 7 9
Key interrupt 4
Other peripherals Low voltage detection, Power-On Reset, Clock output/Buzzer function
On-chip debug function Available
Power supply voltage VDD = 1.6 to 5.5 V
Operating ambient temperature TA = -40 to + 85 ℃ for A-Version product / -40 to + 105 ℃ for G-Version product

 

Pin Count / Memory Size Lineup:

RL78/L12-Pin Count/Memory Size

 

Block Diagram:

RL78/L12 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

Title Description
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.
Video Watch videos related to this product.

 

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.)
e2studio 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.)
Renesas Starter Kit All the development tools you need for MCU evaluation and getting started. Also recommended for training.

 

Hardware Design Support

Title Description
Characteristics data Information on observed values for the RL78/G1F. Please use this as reference data when developing your set.

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