Low-Power Automotive-Grade Touch MCU: IM90xxB

The IM90xxB series MCU is an automotive-grade product designed for smart touch and motor-control automotive nodes. It integrates a high-performance hardware accelerator (HAU) and a PWM module dedicated to motor control, and notably strengthens capacitive-touch capability (supporting up to 20 touch channels with waterproofing and temperature-drift suppression).

In addition, the IM90xxB supports NIST SP800-90-compliant true random-number generation and debug-interface protection, meeting the escalating information-security demands of automotive applications, making it an ideal choice for smart switches, sensors, and micro-motor control.

Main Features

• AEC-Q100 Grade 1, operating temperature -40℃ to 125℃
• 32-bit Arm® Cortex®-M0+ core, 48 MHz
• 1 CAN FD, 2 UART/LIN, 2 SPI, 1 I2C, and more
• 64 KB / 128 KB on-chip flash (100k cycles, ECC); 16 KB SRAM with parity
• 20-channel 12-bit 1 Msps ADC, 12-channel 16-bit PWM with dead-time insertion and fault detection
• 20-channel dedicated capacitive-touch (PTC) module with hardware touch support
• QFN32 and LQFP48 package options

Highlights

• Up to 20 capacitive-touch channels with waterproofing and temperature-drift suppression

• Hardware accelerator and motor-control-dedicated PWM module

• NIST SP800-90 true random-number generation meeting latest info-security requirements

• High-speed CAN FD communication

Applications

Specifications

• Compliant with AEC-Q100 Grade 1

• Power: 2.7 V ~ 5.5 V
• Ambient temperature: -40 ℃ ~ +125 ℃

• LQFP48, QFN32

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

• Integrated PMC supports STOP and RUN modes
• GPIO edge-wakeup support
• STOP-mode current ≤ 10 µA at 25 ℃

• External high-speed clock (HSE): 8 MHz ~ 32 MHz
• Internal high-speed clock (HSI): 48 MHz
• Internal low-speed clock (LSI): 32 kHz

• PFlash up to 128 KB with ECC
• Software-emulated EEPROM for data storage
• RAM up to 16 KB with Hardware Parity

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

• Up to 1 CAN FD module
• Up to 2 UART modules with DMA; all support software LIN
• Up to 1 I2C module with DMA
• Up to 2 SPI modules with DMA

• Unique chip identifier (UUID)
• TRNG/PRNG support
• Clock monitor
• Low-voltage reset (LVR)
• Independent-clock watchdog (WDG)

• Up to 42 GPIO pins with edge-interrupt support
• Non-Maskable Interrupt (NMI) support

• 1× 20-channel 12-bit 1 Msps SAR ADC
• 1× 20-channel PTC (peripheral touch controller)
• 1× 4-channel CMP (analog comparator)
• 1× 12-bit DAC for comparator and external output
• Built-in temperature sensor

• 1× 8-channel SPWM module
• 1× 4-channel IPWM module
• 2× 32-bit timers
• 1× 32-bit RTC

Product Models