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) Resistance value for external resistance division = 1000 kΩ
Main Solutions
Key Features:
| ITEM | Rl78/L12 |
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|---|---|---|---|---|---|---|
| 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 |
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| High speed on-chip oscillator |
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| 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 controller/driver | Method | 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 | |||||
| Safety Function |
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| 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:
Block Diagram:
Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.
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Software Design Support
| Title | Description |
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| 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.) |
| 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. 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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