Microchip Technology CEC1734-S0-I/2HW-TFLX

Overview

CEC1734-S0-I/2HW-TFLX from Microchip Technology is a Real Time Platform Root of Trust Controller implementing hardware-enforced secure boot, SPI flash monitoring, and SPDM-compliant attestation for server and embedded systems. It integrates a 96 MHz ARM Cortex-M4F core, AES256/SHA-384/ECDSA cryptographic accelerators, True Random Number Generator (SP800-90B), and Physically Unclonable Function (PUF) - all operating within a 5.5×5.5×0.92 mm 64-pin VFBGA package.

For engineers reviewing the CEC1734-S0-I/2HW-TFLX datasheet, CEC1734-S0-I/2HW-TFLX pinout, CEC1734-S0-I/2HW-TFLX application, or CEC1734-S0-I/2HW-TFLX equivalent, this device delivers NIST 800-193 and OCP Security Project compliance with pre-provisioned Soteria-G3 firmware, dual-voltage (1.8V/3.3V) operation, and runtime I2C status reporting for AP firmware integrity verification.

Technical Context

The CEC1734-S0-I/2HW-TFLX implements an immutable Boot ROM that loads and authenticates Soteria-G3 firmware from internal flash before enabling secure boot of Application Processor images. Its single QSPI port supports one AP with up to two external SPI flash devices, and its SPI Monitor performs real-time signature calculation and intervention on illegal opcodes like Chip Erase.

This variant uses fused lifecycle management and lockable OTP memory for key storage, supports MISRA/CERT-C validated Soteria-G3 firmware, and provides run-time authentication via I2C status reporting - all while maintaining hardware countermeasures against Differential Power Analysis and supporting transfer of ownership and firmware rollback protection.

Key Specifications

Pinout & Package

CEC1734-S0-I/2HW-TFLX is housed in a 64-pin Very Thin Fine-Pitch Ball Grid Array (VFBGA) package measuring 5.5×5.5×0.92 mm, designed for high-density PCB layouts in server and networking applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar platform root of trust applications.

Compared with CEC1734-S0-I/2HW-TFLX, the CEC1736-S0-I/2ZW-TFLX adds dual-AP support at the cost of larger footprint and higher BOM count, while the MAX34302A+T sacrifices cryptographic depth, runtime features, and firmware agility to reduce unit cost - making CEC1734-S0-I/2HW-TFLX optimal for single-AP systems requiring full NIST 800-193 compliance.

Availability

CEC1734-S0-I/2HW-TFLX is available at Aetrix Electronics and suitable for server BMC security, telecom baseband controllers, and industrial edge gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.

Supply support for CEC1734-S0-I/2HW-TFLX 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

Microchip Technology Inc. is a global semiconductor manufacturer specializing in microcontrollers, analog devices, and security ICs, with headquarters in Chandler, Arizona.

The CEC173x-TFLX product line delivers Real Time Platform Root of Trust Controllers designed specifically for NIST 800-193 and Open Compute Project (OCP) Security compliance in datacenter, telecom, and industrial infrastructure.

FAQ

What is the primary function of the CEC1734-S0-I/2HW-TFLX in a server platform?

The CEC1734-S0-I/2HW-TFLX serves as the Real Time Platform Root of Trust Controller, enforcing hardware-based secure boot of Application Processor firmware stored in external SPI flash. It holds the AP in reset until cryptographic authentication passes, monitors SPI traffic for illegal commands, and reports runtime status via I2C - ensuring NIST 800-193 compliance in server BMC implementations. The CEC1734-S0-I/2HW-TFLX achieves this using its pre-provisioned Soteria-G3 firmware and immutable Boot ROM.

Does the CEC1734-S0-I/2HW-TFLX support dual Application Processors?

No, the CEC1734-S0-I/2HW-TFLX does not support dual Application Processors. Its 64-pin 2HW package contains only one QSPI port, limiting it to a single AP with up to two SPI flash devices. Dual-AP capability requires the 84-pin 2ZW package (e.g., CEC1736-S0-I/2ZW-TFLX), which provides two independent QSPI ports with dedicated SPI monitoring blocks. This distinction is explicitly defined in Section 5.1 of the CEC173x-TFLX datasheet.

How does the SPI Monitor in the CEC1734-S0-I/2HW-TFLX intervene during illegal flash access?

The CEC1734-S0-I/2HW-TFLX SPI Monitor intervenes by asserting hardware control over QSPI signals to cancel illegal operations - such as Chip Erase or Write Enable - before they complete. It operates in real time, calculating hashes during AP firmware reads and blocking unauthorized commands using programmable violation rules. This intervention works with standard 8-pin NOR flash devices and requires no external components. The CEC1734-S0-I/2HW-TFLX implements this entirely in hardware, independent of Soteria-G3 firmware execution.

What cryptographic algorithms are accelerated in hardware by the CEC1734-S0-I/2HW-TFLX?

The CEC1734-S0-I/2HW-TFLX includes a dedicated crypto hardware accelerator supporting AES256 encryption/decryption, SHA-384 hashing, ECDSA signing and verification (P-384 curve), and a SP800-90B–compliant True Random Number Generator. These functions are accessible via ROM-based runtime APIs and are used by the Boot ROM and Soteria-G3 firmware for secure boot, attestation, and key management. The CEC1734-S0-I/2HW-TFLX does not support RSA or SHA-256 in hardware acceleration.

Can the CEC1734-S0-I/2HW-TFLX operate with both 1.8V and 3.3V I/O voltages?

Yes, the CEC1734-S0-I/2HW-TFLX supports user-configurable I/O voltage selection between 1.8V and 3.3V, as confirmed in the Hardware Features section of the datasheet. This setting is controlled via OTP fuses and determines the voltage level for GPIOs, QSPI, and I2C interfaces - enabling direct integration into mixed-voltage system designs without external level shifters. The CEC1734-S0-I/2HW-TFLX maintains full functionality and timing specifications under either voltage configuration.