As part of the efforts to make their vehicles more environmentally friendly, carmakers have increasingly been switching from hydraulic steering assist systems to electric power steering (EPS) using electric motors in order to reduce weight and boost fuel efficiency. In recent years, there has been a trend toward linking functions that assist the driver in operating the vehicle to the EPS system, for example by providing continuously variable steering gear ratio adjustment according to the running speed and steering angle, in addition to simple power shift functionality. This creates demand for microcontrollers (MCUs) capable of supporting sophisticated motor control with features such as high-performance CPU, large memory capacity, dedicated timer units, high-speed, high-precision A/D converters, and interfaces for communicating with other control units. In addition, the ISO 26262 functional safety standard for the automotive field was released in 2011 amid rising concerns over vehicle safety.
Systems that require the highest level of safety, such as the steering and brakes, typically require compliance with ASIL-D,* the highest safety level. This has led to a demand for MCUs that incorporate safety mechanisms such as redundant cores.
Renesas supplies optimized solutions to support system advances, based on technology such as high-performance lock step dual CPU cores.
*ASIL: Automotive Safety Integrity Level.
ASIL-D is the highest Automotive Safety Integrity Level.
Related Products
Microcontrollers
| Recommended Product |
ROM (Bytes) |
RAM (Bytes) |
Operating Frequency (MHz) |
Package (Pin Count) |
Features |
|---|---|---|---|---|---|
| RH850/P1H-C | 4M, 8M | LRAM: 2x64K GRAM: 960K |
160, 240 2×DCLS*1 |
292, 404 FBGA | ICU-M, ECM, ECC, 4xCAN, 4xFlexRay, Ethernet, 2xADC (40×12-bit) |
| RH850/P1M | 512K, 1M, 2M | LRAM: 64K, 128K Trace RAM: 32K ERAM: 8K, 32K |
160 DCLS*1 |
100, 144 LFQFP | ICU-S, ECM, ECC, 3xCAN, 2xFlexRay, 2xADC (12×12-bit) |
| RH850/P1M-E | 1M, 2M | LRAM: 128K GRAM: 64K Trace RAM: 32K ERAM: 8K, 32K |
160 DCLS*1 |
100, 144 LFQFP | ICU-S, ECM, ECC, 3xCANFD, 2xFlexRay, 2xADC (12×12-bit) |
| RH850/P1M-C | 2M | LRAM: 128K GRAM: 320K |
120, 160, 240 DCLS*1 |
144 LQFP, 292 FBGA |
ICU-M, ECM, ECC, CANx3ch, FlexRayx2ch, Ethernet, 2xADC (24×12-bit) |
| RH850/P1L-C | 512K, 1M | LRAM:64K, 100K Trace RAM:32K ERAM: 8K |
120 DCLS*1 |
80, 100, 144 LFQFP | ICU-S, ECM, ECC, 2xCAN, ADC (20x12-bit ) |
*1 DCLS: Dual Core Lock Step
Analog/Power Devices
| Analog/Power Device | Recommended Product |
Features |
|---|---|---|
| EPS Motor Drive MOSFET for 3-phase Brushless Motors |
NP180N04TUK | 40V/1.05mΩ, TO-263 7-pin |
| NP179N04TUK | 40V/1.25mΩ, TO-263-7pin | |
| NP109N04PUK | 40V/1.75mΩ, TO-263 | |
| NP110N04PUK | 40V/1.4mΩ, TO-263 | |
| EPS Motor Drive MOSFET for H-bridge Motors |
NP89N04PUK | 40V/2.95mΩ, TO-263 |
| NP89N04PDK | 40V/2.95mΩ, TO-263 | |
| NP60N04PDK | 40V/3.95mΩ, TO-263 | |
| NP90N04VUK | 40V/2.8mΩ, TO-252 | |
| NP60N04NUK | 40V/4.8mΩ, 8pin HSON | |
| Brake System MOSFET for Failsafe Switches |
RJE0603JPE | -60V/15mΩ, thermal FET |
| Power Management IC | RAA270005KFP | Ideal power solution for RH850/P1x(with Built in voltage regulator for MCU’s core). Integrated fault diagnosis and monitor functions. Support cranking operation. |
| Op-Amp | READ2351JSP | Full range input/output, low power consumption |
| READ2352JSP | Full range input/output, high slew rate | |
| UPC1251/UPC451 | Low power consumption | |
| UPC842/UPC844 | High slew rate | |
| Comparator | UPC277/UPC177 | Low power consumption |