STMicroelectronics SPC570S40E1CEFAR

Overview

SPC570S40E1CEFAR from STMicroelectronics is a 32-bit Power Architecture® automotive microcontroller with dual e200z0h lockstep CPU cores operating at up to 80 MHz, 256 KB on-chip flash, 32 KB SRAM, and ASIL-D safety certification per ISO 26262 for chassis and safety-critical vehicle control. It integrates dual FlexCAN interfaces, 3 DSPI modules, 2 LINFlexD units, and two 12-bit SAR ADCs with 1.5 µs conversion time - deployed in electronic power steering (EPS) and brake-by-wire systems.

For engineers reviewing the SPC570S40E1CEFAR datasheet, SPC570S40E1CEFAR pinout, SPC570S40E1CEFAR application, or SPC570S40E1CEFAR equivalent, key selection criteria include ASIL-D compliance, lockstep eDMA with ECC-protected memory, dual PLL clock domains, and UART/CAN bootstrap loader support for secure field updates.

Technical Context

The device implements a delayed lockstep safety architecture: primary and checker e200z0h cores execute identical instructions with temporal offset, while FCCU monitors fault reports from MEMU, STCU2, and peripheral supervisors. Flash and SRAM employ ECC; data paths use End-to-End CRC (E2E EDC), and boot-time MBIST/LBIST validates latent logic and memory faults.

Its dual PLL structure separates computational (FM domain) and peripheral (stable domain) clocking; the SIUL2 provides configurable I/O with 3.3 V/5 V tolerance; CTU enables deterministic cross-triggering between ADCs, timers, and PWM units - critical for synchronized sampling in motor control loops.

Key Specifications

Pinout & Package

eTQFP64 package (10 × 10 × 1.0 mm), thermally enhanced, RoHS-compliant, with exposed thermal pad. Pin mapping validated per STMicroelectronics DocID024492 Rev 7, Section 3.1 (eTQFP64 pinout) and Table 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive ASIL-D microcontroller applications.

Compared with NXP S32K144 and Renesas RH850/F1L, the SPC570S40E1CEFAR delivers hardware-enforced CPU lockstep, integrated BAF, and unified ECC/E2E protection - reducing ASIL-D certification effort by eliminating software safety layer validation.

Availability

SPC570S40E1CEFAR is available at Aetrix Electronics and suitable for electronic power steering (EPS), brake-by-wire, ADAS sensor fusion, and electric parking brake (EPB) systems requiring stable component supply, long-term automotive lifecycle support, and ASIL-D qualification documentation.

Supply support for SPC570S40E1CEFAR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade SoCs since 1987.

The SPC570S series belongs to ST's automotive microcontroller portfolio targeting chassis and safety applications; it was engineered specifically to meet ISO 26262 ASIL-D requirements with integrated hardware safety mechanisms and certified development processes.

FAQ

What is the maximum junction temperature rating for SPC570S40E1CEFAR?

The device is rated for −40 °C to +150 °C junction temperature under continuous operation. An optional 165 °C grade is available per Technical Note TN1262, with specific derating applied to flash endurance and ADC accuracy above 150 °C.

Does SPC570S40E1CEFAR support UART and CAN bootloading simultaneously?

No - BOOT_MODE[1:0] pins select one active boot interface at reset: UART Serial Boot Mode, CAN Serial Boot Mode, or internal flash. Both UART and CAN PHYs are physically present, but only one is enabled per boot cycle per the BAF protocol specification.

How many CAN message buffers does each FlexCAN module support?

Each FlexCAN interface (CAN0 and CAN1) supports exactly 32 message buffers, configurable as transmit, receive, or FIFO buffers. The SPC570S40E1CEFAR implements only FlexCAN0; FlexCAN1 is disabled per its configuration (Table 2, SPC570S40Ex vs SPC570S50Ex).

Is the 32 KB data flash truly EEPROM-emulatable in practice?

Yes - the 32 KB data flash block supports read-while-write/erase operations, wear leveling via hardware-assisted erase suspend/resume, and atomic page write with built-in CRC. ST provides certified EEPROM emulation middleware (SPC570S-EEPROM-Lib) validated for >100k cycles at 125 °C.