RL78/L12 Group microcontrollers have a built-in liquid crystal display (LCD) panel driver that employs the RL78 core which realizes high processing performance while delivering the lowest power consumption in their class.
In addition to a high-precision (±1%) on-chip oscillator enabling 24 MHz CPU operation and other standard on-chip functions from the RL78/G13, the RL78/L12 microcontrollers are also equipped with a built-in ultralow consumption LCD circuit (0.63 uA by internal voltage boost) that reduces operating current when driving an LCD by 30% compared to previous products.
RL78/L12 microcontrollers support up to 280 LCD segments for panels with many pixels, and three methods of generating LCD drive voltage (internal voltage boost/capacitor split/external resistance division).
In addition, abundant functions for supporting functional safety, such as an A/D converter testing function, are also on-chip.
With 32 to 64-pin packages, these products are suitable for home appliances, remote control, kitchen tools, and other consumer electronics and healthcare devices, industrial equipment, and so on.
Pin Count / Memory Size Lineup:
|32 pins |
|44 pins |
|48 pins |
|52 pins |
|Memory||Code flash||8 to 32 KB||16, 32 KB|
|Data flash||2 KB|
|RAM||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
|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.
|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|
|DMA controller||2 channels|
|Vector interrupt source||Internal||23|
|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|
- APS camera, digital camera, home audio system, air conditioner, washing machine, induction-heating (IH) cooker, electric rice cooker, power meter, pedometer, scale, etc.