Microchip Technology CEC1702Q-B1-SX-TR

Overview

CEC1702Q-B1-SX-TR from Microchip Technology is a cryptographic embedded controller featuring an ARM Cortex-M4F core with hardware FPU, 480KB SRAM (416KB + 64KB), 64KB boot ROM, and integrated AES/SHA/RSA/ECC cryptographic engines. It supports dual power planes (VBAT/VTR), operates at 3.3V/1.8V, and delivers secure boot, RTC, I²C, UART, PWM, ADC, and fan control for IoT platform management.

For engineers reviewing the CEC1702Q-B1-SX-TR datasheet, CEC1702Q-B1-SX-TR pinout, CEC1702Q-B1-SX-TR application, or CEC1702Q-B1-SX-TR equivalent, key selection criteria include VBAT-backed real-time functions, hardware-accelerated crypto (AES-128/192/256, SHA-1/256/512, RSA up to 4096-bit), low-power sleep modes with 32.768 kHz hibernation timers, and 65 GPIOs with programmable drive strength and glitch protection.

Technical Context

The CEC1702Q-B1-SX-TR implements a Von Neumann architecture with single 4GB address space and little-endian byte ordering, supporting bit-banding and NVIC with 240 interrupt sources and 8 priority levels. Its debug infrastructure includes JTAG/SWD, DWT with 4 data watchpoints, FPB with 6 execution breakpoints, and full ITM/TPIU trace support.

Cryptographic acceleration is provided by three dedicated engines: AES (ECB/CTR/CBC/OFB), SHA (1/256/512), and Public Key (RSA 1024–4096-bit, ECC up to 640-bit), all sharing DMA access to SRAM and backed by a true random number generator and monotonic counter. Secure boot enforces hardware root of trust via immutable Boot ROM that authenticates AES-256 encrypted SPI Flash images.

Key Specifications

Pinout & Package

CEC1702Q-B1-SX-TR is housed in an 84-pin WFBGA RoHS-compliant package with 0.5 mm pitch, designed for high-density IoT motherboard integration and thermal efficiency. Pin functions are multiplexed across GPIO, crypto control, power management, and peripheral interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CEC1702Q-B1-SX and CEC1702Q-B1-SXCT, the CEC1702Q-B1-SX-TR provides identical functionality in optimized WFBGA packaging for high-volume, space-constrained IoT designs-offering superior thermal performance and smaller board area while maintaining full pin and firmware compatibility.

Availability

CEC1702Q-B1-SX-TR is available at Aetrix Electronics and suitable for server platform management, industrial gateway security, and smart building controller applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CEC1702Q-B1-SX-TR 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, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The CEC1702 product line is engineered as a cryptographic embedded controller family targeting secure IoT edge platforms, combining 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-TR in system architecture?

The CEC1702Q-B1-SX-TR serves as a dedicated cryptographic embedded controller managing platform-level functions including secure boot, real-time clock, fan control, keyboard scanning, and hardware-accelerated encryption. In server and IoT systems, it operates independently of the host processor to enforce security policies, monitor thermal conditions, and maintain timekeeping during power loss-ensuring deterministic behavior and reduced host CPU overhead. Its VBAT-backed subsystem guarantees continuous operation of critical timing and control logic even when main power is absent.

Does the CEC1702Q-B1-SX-TR support secure firmware updates over SPI Flash?

Yes, the CEC1702Q-B1-SX-TR supports secure firmware updates via its Boot ROM Secure Boot Loader, which authenticates SPI Flash images before loading. It verifies digital signatures using hardware-accelerated RSA/ECC engines and supports AES-256 encrypted images stored in external SPI Flash. The bootloader validates both primary and fallback firmware images, ensuring rollback protection and integrity enforcement at every boot-making CEC1702Q-B1-SX-TR compliant with NIST SP 800-193 guidelines for platform firmware resilience.

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

The CEC1702Q-B1-SX-TR uses dual power planes-VTR (suspend) and VBAT (standby)-to maintain functionality across sleep states. In deepest sleep, only VBAT remains active, powering the RTC, week timer, hibernation timers, VCI interface, and 128B SRAM. VTR powers I²C, GPIOs, and peripherals during lighter sleep modes. Low standby current is achieved through clock gating, selective block shutdown, and 32.768 kHz domain operation-enabling wake-up events triggered by RTC alarms, keyboard scan, or external VCI_IN# signals without host intervention.

Can the CEC1702Q-B1-SX-TR replace legacy Super I/O devices in existing designs?

The CEC1702Q-B1-SX-TR is not a pin-compatible drop-in replacement for traditional Super I/O chips due to architectural differences-including ARM Cortex-M4F core, cryptographic acceleration, and WFBGA packaging. However, it provides superset functionality for modern platforms requiring secure boot, hardware crypto, and advanced power management. Migration requires firmware rearchitecture and PCB layout changes, but delivers measurable benefits in security assurance, firmware update resilience, and low-power operation-making CEC1702Q-B1-SX-TR ideal for next-generation IoT and server platforms where legacy Super I/O limitations are no longer acceptable.

What debugging interfaces are supported by the CEC1702Q-B1-SX-TR?

The CEC1702Q-B1-SX-TR supports industry-standard JTAG/SWD via dedicated pins (JTAG_TDI/TDO/TMS/TCK) and a Trace FIFO Debug Port (TFDP) for real-time instruction tracing. Its ARM-compliant debug infrastructure includes full DWT (4 data watchpoints), FPB (6 execution breakpoints), ITM/TPIU trace output, and NVIC-integrated debug exception handling. These interfaces enable non-intrusive firmware profiling, secure debug authentication, and post-mortem crash analysis-critical for validating secure boot sequences and cryptographic engine behavior in CEC1702Q-B1-SX-TR deployments.