SPC584 B70E3E HC0X | STMicroelectronics | The SPC58 Chorus-4B product line is a general-purpose automotive microcontroller with a Power-Architecture architecture that meets the ISO26263 ASIL-B functional safety level **. It is mainly used in automotive hardware such as body control units, vehicle gateways, vehicle comfort control systems, and vehicle safety peripherals.

1. Main kernel: **e200z 420 3 2-bit Power-Architecture single-core processor**, with a maximum frequency of 120MHz, equipped with VLE variable length encoding technology, which can compress program code and save Flash storage space; Built-in 8KB instruction cache, 2KB data cache, excellent instruction execution efficiency STMicroele...。

2. Independent security core: equipped with the e200z hardware security module HSM, it has its own dedicated flash memory and RAM, and specializes in handling encryption, vehicle security communication, and EVITA-Medium vehicle security standards. Security tasks are isolated from the main CPU and will not be interfered with by the main program failure.

 2. Electrical rated parameters

1. Power supply range: main power 3.0V ~ 5.5V, low-voltage domain of the core 1.14-1.26V, perfectly compatible with the automotive battery power supply environment, can withstand the peak disturbance of the vehicle power supply.

2.Automotive standard certification: AEC-Q100 Grade 3, standard operating temperature range **-40 ℃ ~ + 105 ℃**, suitable for most passenger car cabin and cockpit electronic components;The high-temperature version of the same series model can withstand an environment of 125 ℃ STMicroele...。

3. IO resources: 100-pin eTQFP package, up to 88 GPIO available, most pins support reusing as peripheral function pins.

2. Storage architecture dimension (all equipped with ECC hardware error correction)

All the memory in the chip is equipped with ECC error detection and correction units, which are the basic hardware guarantees for achieving the ASIL-B safety level:

1. Program Flash: 2048KB (2MB) main code flash, supports read-while-erase, partition management;

2. Data Flash: 64KB, can simulate EEPROM, used to save calibration parameters, fault codes, user configuration;

3. HSM independent encryption flash memory: 176KB (144KB program + 32KB data), independent storage of security firmware;

4. On-chip SRAM: 128KB general memory + 64KB kernel local RAM;

5. Bus structure: Cross-switch bus architecture, DMA, peripherals, CPU can access storage in parallel, no bus contention bottleneck; The memory fault management unit MEMU collects storage error information in real time, triggering the safety diagnosis mechanism STMicroele...。

3. Dimension of peripherals and vehicle communication interface (core competitive advantage of this model)

SPC584 B70E3E HC0X is designed for in-vehicle networks, with extremely rich bus resources, and can build multiple in-vehicle CAN-FD and Ethernet gateways:

1.**8-way MCAN FD Controller**: Compatible with ISO‑CAN-FD protocol, supports traditional CAN2.0A / B, suitable for multi-zone communication in the vehicle body, and realizes modular networking of car lights, windows, air conditioning, and door locks;

2. 10 LINFlex bus: LIN low-speed bus is dedicated to connecting window lift, seat motor, wiper, door control and other low-level execution devices;

3. 7 groups of DSPI high-speed serial peripheral interface, I2C, UART serial port, external sensors, driving chips, display screen;

4. 1 lane 10/1 00Mbps Ethernet MAC, following IEEE802. 3-2008, for vehicle Ethernet gateway, vehicle diagnosis, equipment upgrade, vehicle sensor big data transmission;

Simulated peripheral resources

- 3-channel 12-bit SAR-ADC, 1-channel 10-bit ADC, a total of 64 analog acquisition channels, can collect voltage, temperature, sensor analog signals;

Timers, interrupts, DMA peripherals

- 64-channel eDMA multi-channel direct memory access, greatly reducing CPU usage;

- eMIOS enhanced timing IO, supports PWM motor speed control, pulse counting, and encoder acquisition;

- Multi-channel periodic interrupt timer PIT, system timer STM, watchdog SWT, real-time clock RTC, CRC hardware check unit, fault acquisition controller FCCU, used to monitor chip operation faults and trigger safety protection actions.

IV. Functional Safety and Hardware Encryption Dimension (ASIL-B Safety Architecture)

This is also the main upgrade point of the SPC584 series compared with the old SPC56 series, fully compatible with the ISO 26226 automotive functional safety standard ASIL-B level:

1. FCCU Fault Collection Control Unit: monitors kernel, peripherals, clock, power failures, and triggers hardware reset and security interrupts once an anomaly is detected;

2. MEMU memory error management unit, flash memory, RAM open ECC error correction, single bit error automatic repair, multi-bit error report fault;

3. Independent HSM hardware security module, compliant with EVITA-Medium security specification, supports vehicle message encryption, secure boot, firmware signature verification, anti-theft encryption, OTA upgrade security verification, and prevents electronic control programs from being tampered with;

4. Hardware CRC, dual watchdog, clock monitor, power voltage monitoring, build multi-layer hardware fault protection;

5. The AUTOSAR automotive open system architecture is natively supported at the software level, making it convenient for automakers to standardize the development of electronic control programs STMicroele...

Relying on the ASIL-B safety level, multi-channel CAN-FD, Ethernet, and LIN bus resources, this chip is positioned as a body-general electric control MCU, and the mainstream application direction is divided into the following five categories:

1. Body Comfort Control System

Body BCM body control module, four-door door controller, seat controller, sunroof controller, wiper light control system, rearview mirror electric control; The multi-channel LIN bus interfaces with various motor actuators and communicates with CAN-FD and the vehicle gateway.

 2. Vehicle Ethernet gateway

The small and medium-sized vehicle central gateway realizes the data forwarding, message routing, and vehicle equipment diagnosis between the traditional CAN network and the vehicle Ethernet.

3. Low-voltage accessory controller for new energy vehicles

Charging port electronic control, high-voltage accessory detection, battery pack auxiliary monitoring, heat dissipation fan controller.

4. Vehicle security and intelligent peripherals

Anti-theft control system, car door sensor, parking auxiliary equipment, in-car human-machine interaction control panel.

5. Industrial special security electric control

Construction machinery body controller, rail transit auxiliary control unit, industrial equipment master board requiring ASIL-B safety level.

VIII. Horizontal comparison dimension of the same series and competitors

 1. Comparison with the same family SPC584 B70E1 (64-pin version)

| Parameter | SPC585B70E3EH0X | SPC 584B71E1 (64 Pin) |

| Package | 100-eTQFP |64-eTQFP|

| Number of GPIO | 88 | 44 |

| Peripheral surplus | Sufficient, multiple peripherals can be enabled simultaneously | Pin resources are tight |

| Working temperature | -40~100℃ | -40~ 125℃ high temperature specification optional |

1. Heat dissipation design: The bottom heat dissipation pad of eTQFP must have more holes to connect to the ground plane, so that the chip can dissipate heat under long-term Ethernet and CAN bus high-load communication.

2. Power partition design, simulate ADC power supply, kernel power supply, peripheral power supply to do power isolation, reduce the motor, PWM peripherals to bring analog sampling noise;

3.CAN‑FD, LIN, and Ethernet high-speed differential wiring strictly follow the automotive differential wiring specification and reserve ESD protection devices;

4. HSM security module development: secure startup, encryption keys need to be properly managed, and keys should not be leaked during mass production;

5. Functional safety development: Open ECC memory check, FCCU fault monitoring, add fault diagnosis and fault handling logic according to ISO26263-B requirements.

Common specifications of STMicroelectronics:

LIS2DWLTR

LSM6DSV16XTR

LSM6DSV32XTR

L9663-TR-1

LSM6DSOETR3

LSM6DSK320XTR

ISM330DHCXTR

ASM330LHHTR

SPC584B70E3EHC0X

STM32H563MIY3QTR

STM32F0316DIE1

STM32G473VCT6

STM32H7B0ZBT6

STM32L053R8T6

ST (STMicroelectronics) sensors; 3D accelerometer; Temperature sensing; ST sensor; Sensor Gyroscope

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