Renesas integrates resolver sensor interface to MCU

January 18, 2012 // By Christoph Hammerschmidt
Renesas Electronics has developed a new 32-bit microcontroller (MCU), the V850E2/PJ4-E, which incorporates an on-chip resolver sensor interface. The new MCU realizes both higher performance and lower system cost for automotive control systems including motor control for HEV/EV and other automotive applications.

The V850E2/PJ4-E is a derivative of Renesas' P Series of MCUs and belongs to the 32-bit V85 RISC MCU Family. It incorporates Renesas' V850E2 CPU core, which provides high real-time operation, and is equipped with a rich set of peripheral functions for motor control. Renesas' P Series of MCUs is widely adopted as motor control system solutions for automotive applications. With the combination of P Series' dual core lockstep and on-chip resolver sensor interface, the V850E2/PJ4-E MCU is compliant with the ISO 26262 safety standard and easily realizes lower system costs.

Hybrid electric vehicles (HEVs) and electric vehicles (EVs) are rapidly advancing as countermeasures against global warming by cutting CO2 emissions by automobiles. Improvement in controlling function of a driving motor is a key technology for supporting the environmental performance of HEVs/EVs. The V850E2/PJ4-E MCU is introduced to meet the market needs including lower system costs, providing the perfect support for further promoting eco-friendly HEVs/EVs and safety requirements of ISO 26262.

Key Features of the V850E2/PJ4-E MCU include:


  • resolver sensor interface, A/D converter and three-phase PWM timer – ideal for motor control applications. The new MCU integrates Renesas' newly developed on-chip resolver sensor interface corresponds to a wide range of resolver sensors, eliminating the need for an external resolver-digital (R/D) converter. An excitation signal generating function (TPBA) for resolver sensor is also equipped to offer optimum system configuration for driving motor control. The V850E2/PJ4-E device also includes a number of peripheral functions including a high-precision motor control timer (TSG2) that complies with control of various motors, and an A/D converter with synchronized sample-and-hold (S/H) function, which enables more precise measurement of data from each sensor.
  • Dual core lockstep supporting functional safety requirements. The CPU of the V850E2/PJ4-E MCU adopts a dual core lockstep system, in which a comparator continually calculates and detects failures, making it possible to achieve a real-time high failure detection rate via only hardware. The MCU