Ideal for the motor control for HEV/EV. The high-end in-vehicle microcomputer of resolver / one digital converter loading


The RH850/C1M with internal Resolver/Digital Converter (RDC2) and motor control unit (EMU2) reduce CPU load and can control motors with very little CPU interaction.


Main Solutions

Key Features:

Part Name R7F701271EAFP
CPU CPU system RH850G3M (With Lockstep)
CPU frequency 240 MHz
Internal peripheral guard function (IPG) Supported
System error notification function (SEG) Supported
Memory protection unit (MPU) Supported
Floating point unit (FPU) Supported
Memory Program Flash 2 MB
Instruction cache 8 KB
Local RAM 64 KB
Data Flash 32 KB
Global RAM 64 KB
External Interrupt Maskable interrupt (IRQ) 8
Non maskable interrupt (NMI) 1
DMA, DTS DMA 16 channels, DTS 128 channels
Clock Main oscillator (Main OSC) 20 MHz
PLL Supported
Security ICU-S was removed  
I/O ports 66
Timers Timer array unit J (TAUJ) 1 unit (4 timers / unit)
Motor control timers (TSG3) 2 units
Timer option (TAPA) 4 units
Timer pattern buffer (TPBA) 1 unit
Timers for operating system (OSTM) 2 units
Encoder timers (ENCA) 2 units
Watchdog timer (WDTA) 1 unit
Serial interfaces Clocked serial interface (CSIH) 2 channels
CAN interface (RS-CAN) 4 channels (total 256 message buffers)
Serial communication interface (SCI3) 3 channels
A/D converter 12-bit A/D converter core 2 units
ADCC0 (Input pin count and Track and Hold count) 10 input pins x 6 Track and Hold
ADCC1 (Input pin count and Track and Hold count) 15 input pins x 6 Track and Hold
Motor control Resolver/Digital Converter (RDC2) 1 unit
Enhanced motor control unit (EMU2) 1 unit (2 channels)
Other functions Error control module (ECM), Clock monitor (CLMA), Data CRC (DCRA) 2 units, Error collection coding (ECC), On-chip debug (OCD), Peripheral interconnection 1 (PIC1A) 1unit and Peripheral interconnection 2 (PIC2B) 1 unit
Power supply voltage Internal 1.25 ± 0.1 V, 3.3 ± 0.3 V
For I/O 5.0 ± 0.5 V
For Resolver/Digital converter 5.0 ± 0.5 V
For A/D converter 5.0 ± 0.5 V
Operating temperature Junction temperature (Tj) -40 to 150 ℃
Package 144-pin QFP (20 x 20 mm)

Pin Count / Memory Size Lineup:

Program Flash



Block Diagram:

RH850/C1M Block Diagram

You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas products.


Software Design Support

Title Description
CS+ An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)
e2 studio Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project.
E1 A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)


The information contained herein has been provided by a member of Renesas Partners. This information is provided on the Renesas website provided for convenience and informational purposes only. Renesas is not responsible for the contents of this page or any changes or updates to the information posted on this page. Certain links provided herein permit you to leave this site and enter non-Renesas sites. These linked sites are not under control of Renesas. Renesas is not responsible for the contents of any linked site or any changes or updates to such sites. These links are provided for convenience and informational purposes only. The inclusion of any link does not imply endorsement by Renesas of any linked site.

Renesas's Publication of information regarding third-party products or services does not constitute an endorsement regarding the suitability of such products or services or a warranty, representation or endorsement of such products or services either alone or in combination with any of Renesas's product or service.