STMicroelectronics has expanded its 8-bit automotive-grade microcontroller portfolio. It has added competitively priced new devices in compact packages, featuring 20 MIPS processing performance and a peripheral set optimized for automotive body electronics and comfort applications.
Based on ST’s efficient 24MHz STM8A 8-bit processor core, the new STM8AF6223 and STM8AF6226 feature a mix of connectivity, timing, and analogue functions for space-constrained modules such as seat controllers, window lifters, HVAC controls or gateways. An extended temperature range qualifies the MCUs for under-the-hood applications.
Features comprise 8Kbytes on-chip Flash, 640 Bytes true data EEPROM (up to 300kcycles), 1Kbyte RAM, serial interfaces including LIN 2.1, and a 10-bit ADC. A clock security system, two watchdogs (one with independent clock), and a sophisticated memory-protection scheme ensure automotive-level dependability.
Combining the simplicity and robustness of a 5V 8-bit architecture with automotive reliability, the AEC-Q100 qualified devices operate at temperatures up to 150°C and keep running down to 3.0V in cranking conditions.
A choice of compact packages is available. Even the smallest, the TSSOP20, has seven ADC inputs, and six capture/compare channels. The TQFP32 adds three complementary PWM outputs for driving BLDC motors.