1. High-speed On-chip Oscillator
    Matching unnecessary, no oscillation failure, plus greatly shortened oscillation stability time!
  2. Power-on Reset (POR)
    Power rise gradient (Min.) not prescribed!
    * R8C/Mx, R8C/3xC, R8C/3xD, R8C/3xM, R8C/3xT, R8C/3xK, R8C/3xU, R8C/3xQ, R8C/L3xC and R8C/L3xM only.
  3. Low Voltage Detection (LVD)
    Save data during power cut-off!
  4. Data Transfer Controller (DTC)
    Transfer data between memory and registers without going through CPU!
  5. Data Flash with Background Operation (BGO)
    Continue operating CPU during data flash write/erase!
  6. Power-Off Mode
    Built-in Power-Off Mode great for power-saving applications!

 

 

 

*Please see latest hardware manuals for details on functions and their applicable product groups.

 

 

Versatile!  Choose the best MCU for you from our application-matched lineup

 

  • Wide pin selection from 14 to 100 pins
  • Rich package and memory selection
  • Diverse products from high-function to standard

 

 

Easy-to-Use!  The basic concepts serving as the backbone for usability

 

  • Pin assignments which maintain compatibility, and on-chip peripheral functions
  • Built-in high-performance flash memory
  • Robust support for safe design
  • A variety of development tools is available, from starter kits suitable for training and evaluation to emulators equipped with a wealth of debugging functions

 

1、High-speed On-chip Oscillator
High-speed on-chip oscillator
  • Industry top-class oscillation precision
    R8C/32M - 38M and R8C/L35M - L3AM (oscillation frequency 40MHz)*: *Except some groups
    ±1.5% oscillation precision
    in -40℃ - 85℃/1.8V - 5.5V
    60% increase precision than conventional products!
  • Matching unnecessary, no oscillation failure
  • Greatly shortened oscillation stability time
    Shortening from Typ.500μs to Typ.100μs
    Five times faster than conventional products!
  • Reduced EMI noise and improved immunity EMS noise
2、Power-on Reset (POR)
Power-on Reset
  • After power-on, reset is not deasserted until Vdet0 is detected
  • Power rise gradient (Min.) is not prescribed
    * This specification of the power-on reset function is supported by R8C/Mx, R8C/3xC, R8C/3xD, R8C/3xM, R8C/3xT, R8C/3xK, R8C/3xU, R8C/3xQ, R8C/L3xC and R8C/L3xM only.

 

3、Low Voltage Detection (LVD)
Low Voltage Detection
  • Generates interrupts when drops in supply voltage (Vdet1 and Vdet2) are detected
  • Triggers reset when Vdet0 is detected

Can save necessary data to data flash using Vdet1 or Vdet2 interrupt during power cut-off

 

Voltage detection in R8C/3x, R8C/L3xC and R8C/L3xM
R8C/3x, R8C/L3xC and R8C/L3xM can set detection voltages Vdet0, Vdet1, and Vdet2 independently.

 

Low Voltage Detection
4、Data Transfer Controller (DTC)
  • Transfers data between memory and registers without going through CPU
  • Activated by peripheral interrupts

 

 

Data transfer without using DTC

 

Data transfer without using DTC

Data transfer using DTC

 

Data transfer using DTC

   

Send A/D conversion results to RAM

 

Send A/D conversion results to RAM
5、Data Flash with Background Operation (BGO)
  • Continue operating CPU during data flash write/erase
  • Lack of need to hold CPU state greatly shortens instruction execution time and increases interrupt response rate
  • No need to worry about data flash programming time, so feels like programming with external EEPROM

 

*Data flash is flash memory which can be used to store data.

 

Data Flash with Background Operation (BGO)
6、Power-Off Mode
  • Power-off mode*1, a low-power mode that can achieve further power savings compared to the previous wait and stop modes, has been newly added.
    • Added power-off mode 1*1 for operating RTC (real-time clock) functions using a low-speed clock to reduce power consumption due to leak current.
    • Added power-off mode 0*1, in which the power supply is completely disconnected, and which enables exiting by external interrupt.
  • Power-off mode 1*1 can be easily entered using register settings.
    *1: This function is included in the R8C/Lx Series.
      R8C/L3xA, R8C/L3xB, and R8C/L3xM have power-off modes 0 and 1.
     

    R8C/L3xC has power-off mode 0 only.

     

Structure and benefits of power supply control circuit

Structure and benefits of power supply control circuit. This on-chip circuit achieves significant power savings compared to the previous wait and stop modes.