Simple reference design targets power lift and relay-based DC motor-control applications

Mouser is now stocking the StarterTRAK TRK S12VR WLFT reference design from Freescale Semiconductor. Designed as a development platform for the Freescale S12 MagniV S12VR 16-bit microcontroller, the simple reference design targets power lift and relay-based DC Motor Control applications using few external components. The reference design supports anti-pinch and motor stall detection, LIN serial communications, and relay diagnostics, all using the resources of the on board MagniV S12VR microcontroller. The reference design controls a single brushed DC motor through a relay to provide Up/Down and Stop control. At the heart of the board is a 32-pin LQFP S12VR microcontroller that includes a voltage regulator, LIN physical layer, low-side drivers, and high-side drivers. An external Hall Effect sensor determines speed and direction. The LIN 2.2 communications protocol is used for communications with a master LIN node. The board operates over an 8V to 18V supply voltage. A LIN connector supports automotive and industrial networking. Anti-pinch and motor stall conditions is detected through a Hall-effect encoder. Relay diagnostics are supported through four High Voltage Input (HVI) wake up pins on the S12VR which can withstand up to 42VDC, with the diagnostic status transmitted over LIN. Test switches are available for specific window lift features including express up/down, and simulated window ajar detection. A dedicated debug port is available for use with an external Freescale HCS12(X) firmware debugger. Anti-pinch reference software is provided along with full documentation and a complete PCB layout. The Freescale StarterTRAK Reference Design board includes a DVD with the CodeWarrior IDE software development environment. Reference software includes motor control and anti pinch code, training materials and additional support documentation. This reference design targets DC motor control, industrial, and automotive power-operated systems and relay-based applications.