Renesas Electronics has announced the availability of its new RL78/F13 and RL78/F14 16-bit microcontrollers (MCUs) aimed at automotive control systems. The rollout consists of a total of 91 products made up of 60 products in the RL78/F13 group and 31 products in the FL78/F14 group.
The RL78/F13 MCUs are designed for use in an extensive 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 body control system applications, such as BCM (body control module) and HVAC (heating, ventilation, and air conditioning) control that require especially large memory capacities.
To support needs such as the ability to change ROM sizes due to difference in system specifications and 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.
The RL78/F13 MCUs have internal Flash memory sizes from 16 to 128 KB and packages from 20 to 80 pins, while the RL78/F14 MCUs have internal Flash memory with capacities from 48 to 256 KB, packages from 30 to 100 pins, and RAM with capacities up to 20 KB.
The devices are supplied in Renesas’ new QFN package which has indentations on the pin side surface to improve solder wettability during mounting. Since they can operate in ambient temperatures of up to 150°C, they can be directly mounted in actuators, contributing to further system miniaturisation.
To lower power needs, the new MCUs feature standby current consumption of just 500 nA and have a function that allows A/D conversions to be performed without activating the CPU.
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.
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