Overview
Description
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 consumptionNote 1: external resistance division: 1.60 μANote 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.
Note 1: Current (typ.) at 1/3 bias, subclock operation, HALT mode, and RTC operation.
Note 2: Resistance value for external resistance division = 1000 kΩ.
Features
- CPU: RL78 core, Max. 24MHz
- Voltage: 1.6V to 5.5V
- Package: 64-pin QFN, 32 to 64-pin QFP
- Memory: SRAM Max. 1.5KB, Program Flash Max. 32KB
Comparison
Applications
Design & Development
Software & Tools
Software Downloads
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Support
Support Communities
Support Communities
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RL78/L12 I2C communication
Hello everyone,I have a problem which is probably easy to solve, but I can't figure it out.I would like to use the code from R01AN1947EC0100 RL78/G14 GroupI2C Repeated Start Signal https://www.renesas.com/us/en/document/apn/ ...
Jun 13, 2024 -
R5F10RGC (RL78/L12) LCD REGISTERS AND SEGMENT OUTPUTS
Hi, I try to drive custom LCD. I use pin configuration and my configs in below. I want to use these pins as a segment which I selected. I select these pin as a segment but I can't drive these segment pins as a output.. Also, How can I ...
Dec 29, 2022 -
Raspberry Pi serial programmer for RL78/L12 Pull-up resistors
I'm planning on having a programmer header on my custom pcb for serial programming my R5F10RLAGFB with an Raspberry Pi.I have drawn this on my schematic according to the Flash programmer with Raspberry Pi -document However, the document doesn't suggest any values for these pull-up resistors ...
Jul 2, 2025
FAQs
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RL78 Family: Reset signal generated by the power-on reset circuit (POR)
... G1H, RL78/G1M,RL78/G1N, RL78/G1P, RL78/G22, RL78/G23, RL78/G24, RL78/H1D, RL78/I1A, RL78/I1B, RL78/I1C, RL78/I1D, RL78/I1E, RL78/L12, RL78/L13, RL78/L1A, RL78/L1C Japanese
Apr 28, 2025 -
Reference Materials for Migration from 78K0/Kx2 to RL78
We have the following reference materials available. - How to replace a program for 78K0 with a program for RL78 Replacement Guide for 78K0 Family to RL78 Family (CcnvCA78K0) Software for converting a C source file for CA78K0 and CA78K0R to a C source file for CC-RL CcnvCA78K0 C Source ...
Dec 21, 2020 -
If RL78 Accepts External Interrupt Requests That Occur Immediately After Reset
No, that interrupt request will not be accepted. After a reset, the registers are initialized to the state of no interrupt request and no interrupt processing allowed, and therefore are in a state in which no external interrupt request can be accepted. Refer to the user’s manual of each ...
May 25, 2018
Videos & Training
The easy-to-build RL78 Quick Solutions feature Renesas' ultra-low power RL78 MCUs and analog devices. These solutions showcase device combinations that improve design performance and power efficiency to support your product development.