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

Recommended peripheral devices

Analog/Power Device
Recommended Product
Features Featured Document Ordering
Power Management IC RAA270000KFT Ideal power solution for RH850/E1x/C1x. Integrated fault diagnosis and monitor functions. Datasheet Contact Sales
Gate Driver
R2A25110 IGBT Gate Driver with insulating function (micro-isolator), isolation voltage: 2.5KVrms, excessive current protection function, mirror clamp function, soft turnoff function, etc.
Datasheet Contact Sales

You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

Title Description
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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+ This integrated development environment (IDE) can be used for coding, assembly, compiling, and simulation.
e² studio This integrated development environment (IDE) is based on the popular combination of the open-source Eclipse IDE and its CDT plug-in that enables C/C++ language development.
E2 emulator This on-chip debugging emulator has advanced features that improve the efficiency of development. In addition to the basic functions from debugging to flash programming, this emulator supports hot plug-in and external triggers as standard items. This emulator also helps to reduce development time by downloading at high speeds (compared to the E1 emulator) and the ability to work in combination with various solutions such as the CAN communication time measurement solution by systems under development.
E1 emulator This on-chip debugging emulator is a standard model which provides basic debugging functions (production is to be discontinued at the end of December 2019).


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