Renesas Electronics Announces New 40 nm RH850/C1x Series of Microcontrollers
for HEV/EV Motor Control Applications
Integrated R/D Converter(s) and Enhanced Motor Control Peripherals Enable
Higher Efficiency in Single or Dual Motor Control Systems
SANTA CLARA, Calif. -- August 27, 2014
Renesas Electronics Corporation (TSE: 6723), a premier supplier of advanced
semiconductor solutions, today announced the new RH850/C1x Series of 32-bit
microcontrollers (MCUs), designed for motor control in hybrid electric
vehicles (HEVs) and electric vehicles (EVs). Based on Renesas Electronics’
40-nanometer (nm) process, the RH850/C1x Series features the RH850/C1H and
RH850/C1M MCUs, which enable embedded designers to enhance efficiency, reduce
system costs, and achieve higher safety levels for HEV/EV motor control
“Awareness of the vehicle’s environmental footprint is increasing, and HEV/EV
designers are seeking ways to deliver even better performance, which requires
new and more precise motor control systems,” said Amrit Vivekanand, vice
president of automotive, Renesas Electronics America Inc. “The Renesas
RH850/C1x MCU series integrates large flash memory capacity, robust motor
control peripherals, and single/dual motor control options needed to support
the required fine-grained motor control and functional safety for
next-generation HEVs and EVs.”
The new RH850/C1x devices can be used with the RAA270000KFT RH850 Family power
supply management IC (PMIC), which is currently available in sample
quantities. The power management IC integrates into one device all the power
supply systems required for MCU operation, two external sensor power supply
tracks, and a full complement of monitoring and diagnostic functions,
significantly reducing the user burden associated with power supply system
Concerns about global warming and regulatory efforts to reduce automotive CO2
emissions are driving demand for new technologies to achieve higher
efficiencies. For instance, the Corporate Average Fuel Economy (CAFE)
standards are driving OEMS to increase overall fleet miles per gallon (MPG) to
54.5 MPG for cars and light-duty trucks by model-year 2025. As HEV/EV
implementations become more mainstream, higher performance applications will
require MCUs with greater processing capabilities for efficient motor control.
As the HEV/EV market expands, system designers are challenged to reduce costs
and increase performance. By integrating hardware peripherals, dedicated for
motor control, into the MCU, designers can reduce overall system costs and
meet performance requirements.
HEV/EV systems are now being designed to meet ISO 26262 functional safety
standards. This system requirement is driving semiconductor products to
incorporate a number of embedded features that allow system designers to meet
their safety goals.
Key Features of the RH850/C1H and RH850/C1M MCUs:
(1) Incorporation of large memory capacities achieved through 40 nm MONOS
In addition to the use of its leading-edge 40nm process, the RH850/C1x Series
is based on Renesas Electronics’ MONOS (Metal Oxide Nitride Oxide Silicon)
embedded flash, which has an extensive track record in mass production. The
MONOS characteristics include fast readout, low power consumption, and large
storage capacity. The RH850/C1M and RH850/C1H devices offer memory capacities
of 2 MB and 4 MB, respectively. In addition, 32 KB data flash memory, with
essentially the same functionality as EEPROM (electrically erasable and
programmable read-only memory), is included for data storage.
(2) Extensive set of peripheral functions for HEV/EV motor control
To improve motor control performance, Renesas is continuing its collaboration
with Tamagawa Seiki Co., Ltd., a market leader in R/D converter ICs, and is
adopting the technology from that company's new R/D converter IC product, the
AU6805, to incorporate R/D converter^1 (RDC) functionality into the new
RH850/C1x MCUs. Furthermore, the RH850/C1x Series combines the motor control
IP core EMU2 (enhanced motor control unit 2^2) and the TSG3 (Timer S
Generation 3). This allows the RH850/C1x MCUs to implement three types of
motor control in hardware: sine wave PWM, overmodulation, and square wave.
Switching between these three types of motor control according to the
conditions allows for highly efficient control, enabling the MCUs to achieve
faster and higher performance motor control without imposing a load on the
(3) Single motor control and dual motor control support, which can be selected
according to the application structure
To support users' diverse HEV/EV system structures, Renesas provides two
product types: the RH850/C1M, which incorporates a single R/D Converter, for
single motor control and the RH850/C1H, which incorporates a two R/D
Converters, for dual motor control. In particular, the RH850/C1H not only
provides peripheral functions that can process two systems of motor control
independently, but also includes a performance CPU to strengthen software
processing capabilities. These devices make it possible to not only implement
integrated vehicle control, but also energy management control, DC/DC
converter control, battery control and other functions, and other ECU
(4) Diverse set of safety functions for functional safety (ISO 26262) support
Supporting functional safety standards is becoming mission critical due to the
increasing amount of electric and electronic equipment used in contemporary
cars, and the RH850/C1x MCUs contribute to assuring system safety in end
products. The MCUs adopt the lockstep method^3 for the main CPU and support
data error detection and correction by providing ECC (error checking and
correction^4) functions for each memory system, such as the flash memory. The
MCUs include an ECM (error control module^5), to manage error handling. A
diagnostic function has also been added to the MCUs’ built-in R/D converter
(RDC2) to allow better detection compared with using an external RDC. While
diagnostics similar to an external RDC are available, the integrated approach
allows designers to quickly and efficiently detect improper operation and
limit false negative feedback indications.
In addition to the extensive set of diagnostic functions in these new MCUs and
core diagnostic software, Renesas supports user implementation of functional
safety by using a watchdog, power supply monitoring, and reset generation
functions of the RAA270000KFT PMIC products and providing kits that include
these new ICs.
In addition to new product developments, Renesas also intends to provide
solutions based on collaborations with partner companies to support user
system development including a wide range of software in addition to
development environment tools such as debuggers, compilers, model-based
development tools, simulators, and RAM monitors.
^1 R/D converter: A function that calculates the motor rotation axis angle
using analog signals of the resolver sensors.
^2 EMU2 (Enhanced Motor Control Unit 2): A hardware unit that performs motor
control calculations based on motor current inputs, motor rotation angle
inputs, and the command value, and outputs the results through a motor control
^3 Lockstep method: A method in which exactly the same processing is performed
on two processors and any discrepancies are detected.
^4 ECC (Error Checking and Correction): Checks for incorrect values stored in
memory and corrects those to correct values.
^5 ECM (Error Control Module) : A module that generates interrupts and
internal reset signals from a variety of error sources and monitor circuits.
Pricing and Availability
Samples of the RH850/C1H and RH850/C1M MCUs are scheduled to be available from
the beginning of CY2015, priced at US$ 45 and US$50 per unit, respectively.
Mass production is scheduled to begin in May 2016 and is expected to reach a
scale of 100,000 units per month. (Pricing and availability are subject to
change without notice.)
For more information, follow Renesas Electronics America at @RenesasAmerica on
Twitter or http://www.facebook.com/RenesasAmerica.
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About Renesas Electronics Corporation
Renesas Electronics Corporation (TSE: 6723), the world’s number one supplier
of microcontrollers, is a premier supplier of advanced semiconductor solutions
including microcontrollers, SoC solutions and a broad-range of analog and
power devices. Business operations began as Renesas Electronics in April 2010
through the integration of NEC Electronics Corporation (TSE:6723) and Renesas
Technology Corp., with operations spanning research, development, design and
manufacturing for a wide range of applications. Headquartered in Japan,
Renesas Electronics has subsidiaries in 20 countries worldwide. More
information can be found at www.renesas.com.
Renesas Electronics America Media Contact:
Voce Communications, a Porter Novelli Company
Jessica Kerr, 415-975-2213
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