Microchip Technology CEC1702Q-B1-SX

Overview

CEC1702Q-B1-SX from Microchip Technology is a cryptographic embedded controller built around an ARM Cortex-M4F core with hardware floating-point unit, 480KB SRAM (416KB code + 64KB data), 65 GPIOs, and integrated AES/SHA/RSA cryptographic engines. It operates at 3.3V or 1.8V, supports ACPI-compliant sleep modes with VTR/VBAT power planes, and delivers secure boot from external SPI Flash - deployed in IoT platform baseboard management and firmware root-of-trust subsystems.

For engineers reviewing the CEC1702Q-B1-SX datasheet, CEC1702Q-B1-SX pinout, CEC1702Q-B1-SX application, or CEC1702Q-B1-SX equivalent, key selection criteria include its dual-voltage I/O capability, battery-backed RTC and 128-byte VBAT SRAM, hardware-accelerated crypto engines (AES-128/192/256, SHA-1/256/512, RSA up to 4096-bit), and support for deep-sleep wake-up via hibernation timer, week timer, and VCI_IN# inputs.

Technical Context

The CEC1702Q-B1-SX implements a Von Neumann architecture with single 4GB address space, little-endian byte ordering, bit-banding, and NVIC supporting 240 interrupt sources across 8 priority levels. Its debug infrastructure includes JTAG/SWD DAP, full DWT/FPB/ITM/TPIU trace functionality, and Trace FIFO Debug Port (TFDP) for real-time firmware profiling.

Power management integrates VTR (standby) and VBAT (backup) supply planes enabling sub-millisecond wake-up from deepest sleep states using 32.768 kHz clock sources. Cryptographic subsystems share DMA channels with SRAM and include dedicated engines for symmetric (AES), hash (SHA-1/256/512), and asymmetric (RSA/ECC) operations - all anchored by a hardware Root of Trust and immutable Boot ROM loader.

Key Specifications

Pinout & Package

CEC1702Q-B1-SX is housed in an 84-pin WFBGA package (4.0 × 4.0 mm, 0.4 mm pitch) with VTR and VBAT power domains, glitch-protected BGPO outputs, and over-voltage tolerant I/O pins supporting 3.3V or 1.8V operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar cryptographic embedded controller applications.

Compared with CEC1702Q-B1-SX-ND, the CEC1702Q-B1-SX offers identical electrical, thermal, and functional performance but ships in tray packaging - making it preferable for prototyping, low-volume builds, or manual rework scenarios where reel handling is impractical.

Availability

CEC1702Q-B1-SX is available at Aetrix Electronics and suitable for server baseboard management, industrial IoT edge controllers, storage enclosure supervision, and smart PDU applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CEC1702Q-B1-SX 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 leading provider of microcontroller, analog, FPGA, and security solutions, serving automotive, industrial, communications, and computing markets with vertically integrated silicon and development tools.

The CEC1702 product line is designed as a cryptographic embedded controller family for IoT and server platform firmware root-of-trust, integrating ARM Cortex-M4F processing with hardware-accelerated crypto engines and deep-sleep power management.

FAQ

What is the primary function of the CEC1702Q-B1-SX in a server platform?

The CEC1702Q-B1-SX serves as a dedicated cryptographic embedded controller for baseboard management, executing secure boot, firmware authentication, RTC maintenance, fan/thermal control, and ACPI-compliant power-state supervision - all while operating independently of the host CPU and drawing power from VTR/VBAT rails during sleep.

Does the CEC1702Q-B1-SX support secure boot from external flash memory?

Yes, the CEC1702Q-B1-SX implements hardware-rooted secure boot via its immutable Boot ROM, which authenticates and loads firmware images from external SPI Flash using SHA-256 hashing and AES-256 decryption - supporting both primary and fallback images for fail-safe updates.

How does the CEC1702Q-B1-SX manage power during system sleep states?

The CEC1702Q-B1-SX uses separate VTR (standby) and VBAT (backup) power planes to maintain operation of critical peripherals - including RTC, hibernation timer, I2C controllers, and VCI_IN# wake-up inputs - while consuming minimal current during S3/S4/S5 states, enabling sub-second wake-up latency without host intervention.

Can the CEC1702Q-B1-SX replace discrete fan control ICs in thermal management designs?

Yes, the CEC1702Q-B1-SX integrates two complete fan control subsystems - each combining a TACH input and PWM output - with built-in RPM calculation, spin-up routines, aging detection, and 3% accuracy from 500–16k RPM, eliminating the need for external fan controller ICs in server and storage applications.

What cryptographic algorithms are accelerated in hardware by the CEC1702Q-B1-SX?

The CEC1702Q-B1-SX includes dedicated hardware engines for AES (ECB/CTR/CBC/OFB, 128/192/256-bit), SHA-1/256/512, RSA (1024–4096-bit), and ECC (prime/binary field, up to 640-bit), all sharing DMA access to SRAM - enabling high-throughput, low-latency cryptographic operations without CPU overhead.