Low-Power Functional-Safety Automotive-Grade MCU: IM90xxA

IM90xxA is a high-performance automotive-grade MCU based on the Cortex-M0+ core, optimized for the technical requirements of automotive actuator and sensor control to meet enhanced information security, rich connectivity, and functional-safety demands. The product integrates an HAU (Hardware Acceleration Unit) for three-phase brushless motors, supporting multiplication/division, trigonometric functions, and square-root operations, greatly reducing the execution time of motor FOC algorithms and improving motor-control efficiency. Power consumption is also highly optimized—its operating current and sleep current are only 12 mA and 10 µA respectively, just 50% of comparable products—to meet the stringent energy requirements of new-energy vehicles.

Main Features

• Compliant with AEC-Q100 Grade 1; operating temperature range −40 °C to +125 °C
• Compliant with ISO 26262 ASIL-B functional-safety standard
• 32-bit Arm® Cortex®-M0+ core, CPU frequency 48 MHz
• 1× CAN FD, 3× UART LIN, 2× SPI, 2× I2C
• 20-channel 12-bit 1 Mbps ADC, 24-channel 16-bit PWM with dead-time insertion and fault detection
• 256 KB Flash, 64 KB Data Flash (100K erase/write cycles), 32 KB SRAM, all with ECC support
• Supports LQFP64, LQFP48, and QFN32 packages

Highlights

• High performance: Cortex-M0+ core at 48 MHz handles complex tasks more efficiently.
• Efficient motor control: HAU module accelerates the FOC algorithm and improves control efficiency.
• Ample storage: 256 KB Code Flash and 64 KB Data Flash, with EEPROM emulation.
• Functional safety: Compliant with ASIL-B, ensuring safe and reliable applications.
• High-speed communication: Supports CAN-FD to meet in-vehicle network requirements.
• Ultra-low power: 10 µA sleep current extends battery life.

Applications

Specifications

• Compliant with AEC-Q100 Grade 1

• Input supply: 2.7 V ~ 5.5 V
• Ambient temperature: −40 °C ~ +125 °C

• 32-bit Arm® Cortex®-M0+ core
• Configurable Nested Vectored Interrupt Controller (NVIC)
• CPU frequency 48 MHz
• 8 programmable memory-region MPU
• SysTick

• Integrated PMC (Power Management Controller) supports STOP and RUN modes
• Supports GPIO edge wake-up
• STOP-mode current ≤ 15 µA at 25 °C

• External high-speed clock (XOSC): 4 MHz ~ 30 MHz
• Internal high-speed clock (HFOSC): 8 MHz
• Internal low-speed clock (LPOSC): 32 kHz
• Phase-Locked Loop (PLL)

• PFlash up to 256 KB, DFlash up to 64 KB, with ECC
• Software-emulated EEPROM for data storage
• RAM up to 32 KB, with ECC

• Up to 57 GPIO pins with edge-interrupt support
• Supports Non-Maskable Interrupt (NMI)

• Designed to the ISO 26262 ASIL-B level
• Unique chip identifier (UUID)
• Clock monitor
• Low-voltage detection and low-voltage reset (LVD/LVR)
• Independent-clock watchdog (WDG)

• Cyclic Redundancy Check module (CRC)
• Serial Wire Debug interface (SWD)
• 4-channel DMA
• HAU (Hardware Acceleration Unit) accelerates various complex operations (division / square root / RMS / trigonometric functions, etc.)

• Up to 3 UART modules with DMA, all 3 supporting software LIN
• Up to 2 I2C modules with DMA
• Up to 2 SPI modules with DMA
• 1 CAN-FD module, compatible with CAN 2.0B

• 1× 20-channel 12-bit 1 Mbps SAR ADC
• 1× 8-channel CMP (analog comparator)
• 1× 8-bit DAC for comparator and external output
• Built-in temperature sensor

• 2× 8-channel SPWM modules
• 2× 4-channel IPWM modules
• 2× 32-bit timers
• 1× 32-bit real-time clock (RTC)

• LQFP64, LQFP48, QFN32

Product Models