RH850/E1M-S2 microcontrollers are suitable for engine control and at 320 MHz have the highest class of operating frequency among automotive microcontrollers. They are also equipped with large-capacity on-chip code flash and RAM.


The CPU core of the RH850/E1M-S2 delivers 30% better performance for engine control system applications than its predecessor. The RH850/E1M-S2 supports the SENT communication standard for sensor information, and also supports not only CAN FD for higher speed in-vehicle networks, but also ICU-S for the automotive security that will be demanded by cars going forward. It also has many built-in functions for realizing functional safety (ISO 26262) that facilitate certification.


Main Solutions

Key Features:

CPU Core 240/320MHz core x1 (Inc. Lockstep dual core x1)
80MHz core (Peripheral Control core) x1
FPU x1
Clock Main Oscillator: 20 MHz, PLL with selectable SSCG mode: 320/240 MHz, PLL without SSCG mode: 80 MHz, On-chip low-speed oscillator: 240 kHz
Data transfer Timers DMAC / DTS yes
Engine Control Timer (ATU-IV) 1 unit
Autonomous pulse adapter (APA) 1 ch
Motor Control Timer (TSG2) 2 ch
Timer Option (TAPA) 2 ch
Analog SAR A/D Converter 48 ch, 2 modules
Delta-Sigma A/D Converter 8 ch, 8 modules
Communication Interfaces Serial Communication Interface (SCI3) 4 ch
Clock Synchronous Serial Interface(CSIH) 4 ch
High-Speed Bus (RHSB) 2 ch
LIN/Master (RLIN2) 1 ch
CAN/CAN-FD (Selectable) 4 ch
FlexRay 1 unit
Digital Filter Engine (DFE) 16 ch, 1 units
Safety Multi-Input Signature Generator (MISG)
Clock Monitor
Watchdog Timer
Secure Watchdog Timer
Memory protection function
Voltage Monitor
Security Hardware security module
(compliant with SHE/EVITA-Light automotive security standard)
Power Supply Voltage 1.15 - 1.35 V (CPU core)  
3.0 - 3.6 V / 4.5 - 5.5 V (I/O, System, AD conveter)
Temperature Tj= -40 - +150 degC

Pin Count / Memory Size Lineup:

Program Flash



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

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+ 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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