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16-bit microcontrollers extend Renesas’  automotive systems offering

16-bit microcontrollers extend Renesas’ automotive systems offering

New Products |
By eeNews Europe



The new MCU product line consists of total of 91 products including 60 products in the RL78/F13 Group and 31 products in the FL78/F14 Group. The RL78/F13 MCUs are designed for use in a wide range of automotive applications; from body control systems such as power window and side mirror control, to automotive motor control systems such as electric water pumps and cooling fans. The RL78/F14 MCUs support the body control system applications, such as BCM (body control module) and HVAC (heating, ventilation, and air conditioning) control that require especially large memory capacities.

Key features of the RL78/F13 and RL78/F14 MCUs include:

· Extensive product lineup that supports easy platform standardisation contribute to development efficiency. To support needs such as the ability to change ROM sizes due to difference in system specifications to supporting reuse in a completely different system, the new MCUs all integrate the same CPU core, peripheral functions including automotive networks such as CAN and LIN, and pin layout. Thus, these MCUs support a wide range of applications. This enables the construction of a development platform based on the reuse of design assets such as software and printed circuit boards which contribute to increased development efficiency of the overall systems. The RL78/F13 and RL78/F14 MCUs also adopt the high-functionality MCU peripheral functions of the existing Renesas’ 78K0R and R8C CPU cores.

· Compact package and support for high-temperature operation up to 150°C allow reduction of the overall unit size. Renesas has developed a new QFN package to respond to needs for even more compact ECUs. When compared to Renesas’ existing 32-pin SSOP, the new QFN package can reduce mounting areas by approximately 69%. Compared to Renesas’ existing QFN packages, the new QFN package has indentations on the pin side surface to improve solder wettability during mounting. This makes it possible to mount the new MCU devices without making any changes to the factory production line. The adoption of this new QFN package allows the size of the printed circuit board to be reduced, and therefore contribute to miniaturization of the overall ECU systems.

· 50% reduced standby mode power consumption contribute to low power system design. By adopting a lower current consumption process, standby mode current consumption is reduced by 50 percent from the 1 µA of Renesas’ existing 78K0R/Fx3 MCUs to 500 nA. The new MCUs also contribute to lower system power consumption with a function that allows A/D conversions to be performed without activating the CPU.

· Extensive set of hardware functions that support functional safety. Improved structures (for functional safety) that allow electrical or electronic faults to be detected and safety assured are now strongly desired for automotive systems in preparation for conformance with the ISO 26262 functional safety standard, and there is a growing need to incorporate the self-diagnostic functions within the MCUs.

The RL78/F13 and RL78/F14 MCUs incorporate a variety of hardware features that support systems’ functional safety including: a test function that verifies that the A/D converter is operating correctly by converting a reference voltage or the power supply voltage and comparing the result to a standard value; a function that prevents software runaway by detecting stack overflow with an interrupt; and a function that detects if an external clock oscillator has stopped by comparing it to an internal oscillator.

Renesas Electronics; https://www.renesas.com/press/news/2013/news20130912_s.jsp

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