On February 20, 2023, National Technology officially launched the N32A455 series of car-grade MCUs in Shenzhen, which have the advantages of versatility, hardware security, and high reliability of car-grade, and announced mass production. This is the first mainstream car MCU product released by National Technology that meets the AEC-Q100 car standard after the N32S032 car-grade EAL5+ security chip.

The "new three modernizations" in the automotive field drive the rapid upgrading of MCU chips for vehicles and put forward higher requirements for chip performance, reliability, adaptability, safety, etc., and the N32A455 series of automotive MCUs came into being. The chip adopts a 40nm automotive-grade process, is equipped with Arm Cortex-M4 core + FPU, supports DSP instructions and MPU, and has a main frequency of up to 144MHz. It adopts the mainstream configuration in the market, has high processing performance, rich analog peripherals, and communication interface resources, and With advantages such as hardware-level security and AEC-Q100 automotive-grade high reliability, it is widely used in automotive electronics markets such as smart light control, motor control, body control, virtual instrumentation, and smart cockpit.

Advantages and features of N32A455 series automotive MCU

Advantages and features of N32A455 series automotive MCU

1. High-performance architecture design

The N32A455 series is based on the Arm Cortex-M4 core, with a working frequency of 144MHz, supports floating-point operations and DSP instructions, has a built-in 8KB instruction cache, and supports Flash acceleration units to execute programs with 0 waits. The chip is configured with 144KB SRAM, and 512KBytes embedded encrypted Flash, and the performance reaches 180 DMIPS.

2. Abundant analog peripherals simplify system design

• 4 12bit 5Msps high-speed ADCs: can be configured as 12/10/8/6bit mode, the sampling rate in 6bit mode is up to 9Msps, supports up to 38 external sampling channels, supports single-ended input and differential input;

• 4 rail-to-rail operational amplifiers: built-in maximum 32 times programmable gain amplification;

• Up to 7 high-speed analog comparators, built-in 64-level adjustable comparison reference;

• Two 12bit DACs: sampling rate 1Msps.

3. On-chip integrated CAN and LIN bus communication interfaces commonly used in automobiles, more flexible expansion

• 2 CAN 2.0A/B bus interfaces;

• 7 LIN/U(S)ART interfaces: the maximum rate is up to 4.5 Mbps, including 3 USART interfaces (supporting 1xISO7816, 1xIrDA, SmartCard), 4 UART interfaces;

• 3 SPI interfaces: up to 36 MHz, 2 of which support I2S;

• 1 QSPI interface: rate up to 144 Mbps;

• 4 I2C interfaces: the rate is up to 1MHz, the master-slave mode can be configured, and the slave mode supports dual-address response;

• 1 SDIO interface: support SD/MMC format.

4. Hardware-level security protection

The N32A455 series inherits the unique chip-level hardware security technology of the National Technology N32 series products and has a built-in cryptographic algorithm hardware acceleration engine that supports AES, DES/3DES, SHA1/224/256, SM1, SM3, SM4, SM7, MD5, and other cryptographic algorithms. The chip adopts multiple security protection mechanisms such as Flash storage encryption, multi-user partition management, write protection (WRP), multiple read protection (RDP) levels (L0/L1/L2), encrypted downloads, etc., to protect the core intellectual property rights of user codes.

5. High reliability of automotive grade

The N32A455 series is designed and produced by automotive technology, with an operating temperature of -40°C to 125°C, and has passed AEC-Q100 automotive standard certification.

supply guarantee

The N32A455 series chips currently provide 6 sub-models, and the official promises to continue to provide a stable supply for more than 15 years. You can contact National Technology or authorized agents to obtain mass-produced chips and development boards.

Comprehensive and convenient development support

N32A455 provides two minimum system boards, N32A455CEL7-STB_V1.0 and N32A455REL7-STB_V1.0, and N32A455VEL7-EVB_V1.1 full-featured evaluation board, which fully supports software development tools such as Keil, IAR, and GCC, and provides high-efficiency NS-LINK production tools. The development kit software source code, hardware reference design, application notes, and other technical documents are complete and available for download on the official website and FTP server (ftp://58.250.18.138). National Technology provides technical exchange and support services through multiple channels such as the online public account (Nations gas station), N32 MCU technical forum, etc.