Automotive-Grade MCU with FOTA and Information Security: IM94xxB

The IM94xxB is a high-performance automotive-grade MCU based on the Cortex-M4F core, designed for the stringent demands of automotive electronic applications. It integrates a DSP instruction set and a floating-point unit for excellent computing capability. In addition, the IM94xxB supports the ASIL-B functional-safety level and embeds an HSM-Full hardware crypto engine capable of AES-256, RSA, and ECC symmetric/asymmetric algorithms, as well as Chinese-national algorithms SM2/3/4. The HSM module features an independent security core with dedicated storage and data space, supports running secure firmware, and allows user-defined algorithms to meet diverse information-security needs.

Main Features

• AEC-Q100 Grade 1, operating temperature -40℃ to 125℃
• ISO 26262 ASIL-B functional-safety compliant
• 32-bit Arm® Cortex®-M4F core, 160 MHz
• 6 CAN FD, 8 UART/LIN, 6 SPI, 2 I2C, 4 SENT
• 3× 26-channel 12-bit 1 Msps ADC, 56-channel 16-bit PWM with dead-time insertion and fault detection
• 2 MB Flash, 256 KB Data Flash (100k cycles); 192 KB SRAM; all with ECC
• Evita-Full security module with secure boot
• LQFP176, LQFP144, LQFP100, LQFP64 packages; LQFP100/64 pin-compatible with IM94xxA

Highlights

• High performance, low power: Cortex-M4F core at 160 MHz, powerful yet efficient.
• FOTA support: 2 MB Flash with A/B swap for safe over-the-air updates.
• Large storage: 256 KB Data Flash with emulated EEPROM for ample capacity.
• Information security: built-in HSM-Full module supports various crypto algorithms for advanced security needs.
• Functional-safety certified: ASIL-B certified for safety-related applications.

Applications

Specifications

• Compliant with AEC-Q100 Grade 1

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

• 32-bit Arm® Cortex®-M4F core
• Configurable Nested Vectored Interrupt Controller (NVIC)
• CPU frequency 160 MHz
• 8 programmable memory-region MPU
• SysTick

• Integrated PMC supports STOP and RUN modes
• GPIO edge-wakeup support
• STOP-mode current ≤ 100 µA (typical) at 25 ℃

• External high-speed clock (HSE): 4 MHz ~ 30 MHz crystal
• Internal high-speed clock (HSI): 8 MHz
• Internal low-speed clock (LSI): 32 kHz
• Phase-Locked Loop (PLL)

• PFlash up to 2 MB, DFlash up to 256 KB, with ECC
• Software-emulated EEPROM for data storage
• RAM up to 192 KB, with ECC

• Cyclic Redundancy Check module (CRC)
• Serial Wire Debug interface (SWD)
• 12-channel DMA

• Designed to the ISO 26262 ASIL-B level
• Evita-Full security module with symmetric/asymmetric crypto, secure boot, and debug-port protection
• Unique chip identifier (UUID)
• Clock monitor
• Low-voltage detection and low-voltage reset (LVD/LVR)
• Independent-clock watchdog (WDG)

• Up to 152 GPIO pins with edge-interrupt support
• Non-Maskable Interrupt (NMI) support

• Up to 8 UART modules with DMA; all support software LIN
• Up to 2 I2C modules with DMA
• Up to 6 SPI modules with DMA
• 6 CAN-FD modules, compatible with CAN 2.0B

• 3× 26-channel 12-bit 1 Msps SAR ADC
• 1× 8-channel CMP (analog comparator)
• 1× 8-bit DAC for comparator and external output
• Built-in temperature sensor

• 6× 8-channel SPWM modules
• 2× 4-channel IPWM modules
• 4× 32-bit timers
• 1× 32-bit RTC

• LQFP176, LQFP144, LQFP100, LQFP64

Product Models