Renesas Electronics RL78/G14 Series MCUs

Renesas Electronics RL78/G14 Series Microcontrollers (MCUs) are the high function general-purpose microcontrollers that consume low-power and are suitable for motor control, industrial, and metering applications. These MCUs balance the low level of consumption current (CPU: 66μA/MHz, standby (STOP): 240nA) and 51.2 DMIPS (32MHz) high calculation performance. The built-in high-function timer of these RL78/G14 MCUs supports three-phase motor control using three-phase complementary PWM output. The RL78/G14 series offers on-chip oscillator, data flash, A/D and D/A converters, and comparator among other circuits. These MCUs are capable of providing IEC/UL 60730 safety standards to the household appliances through built-in safety features. 

Features

  • Ultra-low power consumption technology:
    • VDD = single power supply voltage of 1.6V to 5.5V 
    • HALT mode
    • STOP mode
    • SNOOZE mode
  • RL78 CPU core: 
    • CISC architecture with 3-stage pipeline
    • Minimum instruction execution time:
      • Can be changed from 0.03125μs at 32MHz operation with a high-speed on-chip oscillator to ultra-low 30.5μs @ 32.768kHz operation speed (with subsystem clock)
    • Multiply/divide/multiply and accumulate instructions are supported
    • 1MB address space
    • General-purpose registers: (8-bit register × 8) × 4 banks
    • 2.5KB to 48KB on-chip RAM 
  • Code flash memory:
    • 16KB to 512KB code flash memory
    • 1KB block size
    • Prohibition of block erase and rewriting (security function)
    • On-chip debug function
    • Self-programming (with boot swap function/flash shield window function)
  • Data flash memory:
    • 4KB and 8KB data flash memory
    • Background Operation (BGO): Instructions can be executed from the program memory while rewriting the data flash memory
    • 1,000,000 number of rewrites (Typical)
    • Voltage of rewrites: VDD = 1.8V to 5.5V
  • High-speed on-chip oscillator:
    • Select from 64MHz, 48MHz, 32MHz, 24MHz, 16MHz, 12MHz, 8MHz, 6MHz, 4MHz, 3MHz, 2MHz, and 1MHz
    • ±1.0% high accuracy (VDD = 1.8V to 5.5V, TA = -20°C to 85°C)
  • Power management and reset function:
    • On-chip Power-on-Reset (POR) circuit
    • On-chip Voltage Detector (LVD) (Select interrupt and reset from 14 levels)
  • Data Transfer Controller (DTC):
    • Transfer modes: Normal transfer mode, repeat transfer mode, and block transfer mode
    • Activation sources: Activated by interrupt sources.
    • Chain transfer function
    Event Link Controller (ELC):
    • Event signals of 19 to 26 types can be linked to the specified peripheral function
  • Serial interfaces:
    • 3 to 8 channels CSI 
    • UART/UART (LIN-bus supported): 3 or 4 channels
    • I2C/simplified I2C: 3 to 8 channels
  • Timer:
    • 8 to 12 channels 16-bit timer
    • Timer Array Unit (TAU): 4 to 8 channels, Timer RJ: 1 channel, Timer RD: 2 channels, and Timer RG: 1 channel)
    • 12-bit interval timer: 1 channel
    • Real-time clock: 1 channel (calendar for 99 years, alarm function, and clock correction function)
    • Watchdog timer: 1 channel (operable with the dedicated low-speed on-chip oscillator)
  • A/D Converter:
    • 8/10-bit resolution A/D converter (VDD = 1.6V to 5.5V)
    •  8 to 20 channels analog input
    • Internal reference voltage (1.45V) and temperature sensor
  • D/A Converter:
    • 8-bit resolution D/A converter (VDD = 1.6V to 5.5V)
    • Analog output: None or up to two channels
    • Output voltage: 0V to VDD
    • Real-time output function
  • Comparator:
    • None or up to two channels
    • Operating modes:
      • Comparator high-speed mode, comparator low-speed mode, and window mode
    • The external reference voltage or internal reference voltage can be selected as the reference voltage
  • Operating ambient temperature:
    • TA = -40 to 85°C (A: Consumer applications, D: Industrial applications)
    • TA = -40 to 105°C (G: Industrial applications)

Applications

  • Motor control
  • Consumer and industrial equipment
  • Home/office automation
  • Metering
  • General purposes

Additional Resources

Block Diagram

Block Diagram - Renesas Electronics RL78/G14 Series MCUs
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