The MCU lineup of Renesas includes the RX23T Group with built-in floating-point unit (FPU) suitable for vector control, and the RL78/G14 Group capable of vector control even at low pin counts, which are suitable for inverter control in refrigerator applications. Their on-chip features allow the design of efficient motor drive solutions which allow refrigerators to be made more eco-friendly. For refrigerator system control, the RL78/G13 Group, the RX230 Group, and the RA4M1 Group are ideal product groups in that they incorporate a variety of A/D converters to allow precise control of the internal temperature. In addition, the RX130 Group, the RX230 Group, the RX651 Group and the RA4M1 Group MCU is designed to implement a touch panel solution which allows the appliance manufacturer to provide flat panel interfaces free of protrusions or indentations, thus improving cleaning and maintenance.

Refridgerator (High-End)

System Block Diagram

Recommended Products
Block Semiconductor Device Recommended Products Features
System Control System control MCU RX230 Group
RX231 Group
Enhanced DSP/FPU, Connectivity (USB), HMI (Capacitive Touch), Security, Low power consumption, 5V
RL78/G13 Group
RL78/G13A Group
5V operation, Rich line-up, can be used in a wide variety of applications
5V operation with low operating current

RA4M1 Group

Arm Cortex-M4 with LCD Controller and Capacitive Touch for HMI
Sensors ZMOD4450

Refrigeration air quality Monitoring

Compressor Control Compressor control MCU RX23T Group
RX24T Group
32-bit MCU including on-chip FPU enables to easily program complex inverter control algorithms
32-bit MCU including on-chip FPU enable to drive two motors simultaneously
RL78/G14 Group
RL78/G1F Group
Three-phase complementary PWM output, Rich line-up
Multifunctional microcontrollers with enhanced functionality suitable for sensor-less BLDC motor control
HMI MCU HMI MCU RX130 Group Enhanced capacitive touch function, 5V operation
RX230 Group Enhanced DSP/FPU, Connectivity (USB), HMI (Capacitive Touch), Security, Low power consumption, 5V
RX651 Group Voice Recognition
Large-capacity RAM, Connectivity (Ethernet, USB), HMI (LCD), Security, Motor
RA6M1 Group Capacitive Touch+Voice Recognition
Arm Cortex-M4 core Capacitive Touch for HMI and advanced analog
Sensor Output Op-amp READ2303G
Full range input/output, high slew rate
Low power consumption, high slew rate
PFC Power Supply PFC IC R2A20112ASP Critical conduction mode single
MCU I/F in Control Unit Photocoupler (standard) PS23xx Series
PS28xx Series
High isolation voltage (5kVr.m.s.), 4p-LSOP, Ta=115°C
High isolation voltage (2.5kVr.m.s.), 4p-SSOP, Ta=100°C
High isolation voltage (5kVr.m.s.), 4p-LSSOP, Ta=115°C
Related Software
Related Boards
Name Part No.
R2A20113A evaluation board * -
24V Motor Control Evaluation System for RX23T RTK0EM0006S01212BJ

*:Please contact your sales representative or contact us directly.