1.1 Outline
This RH850/U2B is a 32-bit single-chip microcontroller with multiple CPUs, Code Flash, Data Flash, RAM
modules, DMA controllers, A/D converters, timer units and many communication interfaces that are used in
the automotive applications. This microcontroller conforms to the Automotive Safety Integrity Level (ASIL)
that is highly demanded in the recent automotive field (ASIL D level).
RH850/U2B main features are as follows:
(1) RH850 multi-core CPU
This microcontroller contains multi RH850G4MH2 cores support RISC-type instruction sets and have
significantly improved the instruction execution speed with basic instructions (one clock cycle per instruction)
and the optimized 10-stage pipeline configurations. Furthermore, this product also supports multiplication
instructions using a 32-bit hardware multiplier, saturated product-sum operation instructions, and bit
manipulation instructions as instructions best suited for various fields.In addition, this product also support
CPU virtualization function. Two-byte basic instructions and high-level language instructions improve object
code efficiency for the C compiler and reduce the program size. Furthermore, this product is suited for advanced real-time control applications by offering a high-speed response time including the processing time of the onchip interrupt controller.

(2) On-Chip Code Flash and Data Flash
This microcontroller has high-speed Code Flash from which CPU can fetch the instructions and the constant data. Code Flash with a capacity of up to 24MB can be reprogrammed when the chip is implemented in the application system. This chip also has Data Flash capable of EEPROM emulation with a capacity of up to 512 KB and up to 160 KB exclusively for ICUMHB.