Freescale Kinetis KV1x MCUs

The Kinetis V Series KV1x MCU family is the entry point to Freescale Semiconductor’s Kinetis V series, a scalable microcontroller (MCU) family that targets digital motor control applications. Based on a 75 MHz ARM Cortex‑M0+ core, the range includes an integer divide and square root co‑processor that reduces the CPU load caused by motor control algorithms.

The MCUs include an analog and timing peripheral set with two 12/16‑bit analog‑to‑digital converters (ADCs) capable of 1.2 MSps in 12-bit mode for fast signal acquisition and conversion; a 12-bit digital‑to‑analog converter (DAC); and two analog comparators said to reduce bill of material (BOM) costs while providing fault protection against overcurrent/overvoltage conditions. Multiple Freescale FlexTimers generate high-resolution PWM signals, while a programmable delay block detects rotor positions in sensorless applications.

In order to help meet compliance with IEC‑60730 safety standards for household appliances, the MCUs have two independent watchdogs to help ensure the safe operation of on-chip firmware. A hardware cyclic redundancy check (CRC) engine allows safety verification of the validity of the contents of the Flash memory, as well as checking the integrity of onboard serial communications. Target applications include brushless DC motor control, stepper motor control and low-voltage DC motor control.