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Single-chip MCU aimed at automotive DC motor apps

Posted: 24 Jun 2011     Print Version  Bookmark and Share

Keywords:single-chip  microcontroller  mcu  mixed-signal 

Freescale Semiconductor debuts the S12VR64, a single-chip device as part of its S12 MagniV mixed-signal microcontroller family that is designed for use in DC motors for automotive window lift and sunroof applications connected to local interconnect network (LIN) automotive body networks.

The S12VR64 MCU is based on Freescale's LL18UHV technology (announced in October 2010) that enables extensive analogue integration on the MCU so developers can connect high-voltage signals and power supplies directly to the MCU in their automotive designs, helping save board space, increase system quality and reduce complexity.

Traditionally, automotive electronic designs have required multiple devices: some created with a high-voltage process to connect to the battery and power actuator outputs, as well as MCUs created with a low-voltage digital logic process. This poses a challenge when the end application has space limitations. The S12VR64 MCU combines the different devices required for relay-driven electric motor control, including the LIN physical layers, voltage regulators and low- and high-side drivers, into one device.

This level of integration is accomplished via the LL18UHV technology, which uses Freescale's proven, low-leakage 0.18µm (LL18) fabrication process to integrate 40V analogue, non-volatile memory (NVM) and digital logic on a single piece of silicon. The result is a compact and cost-effective solution that does what it takes up to four chips to accomplish in current designs. Fewer components increase overall quality, allow customers to create a smaller board and ultimately reduce the weight of the automobile.

Freescale intends to expand the S12 MagniV family to include a full range of AEC-Q100 qualified products that integrate an MCU, automotive voltage regulators, LIN and CAN physical layers, motor drivers and more in either single-chip or dual-die form, all in single-package solutions. The next parts planned for the S12 MagniV family are single-chip solutions for applications such as brushless DC motor control, LED lighting, stepper motor control, generic LIN slave nodes or a general-purpose MCU combined with high-voltage I/O.

The S12VR64 MCU is included in Freescale's product longevity programme, with assured supply for a minimum of 15 years.

Samples of the S12VR64 MCU are available now. Freescale expects the S12VR64 to achieve automotive AEC-100 qualification by early 2012. Budgetary pricing is Rs.73.66 ($1.65) in 10,000-piece quantities.

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