Microchip Technology MA990004

Overview

MA990004 from Microchip Technology is the CEC1702 cryptographic embedded controller, an ARM Cortex-M4F-based secure EC designed for IoT platform management. It integrates hardware AES/SHA/RSA engines, 480KB SRAM, RTC with VBAT backup, dual I2C/SMBus controllers, and 65 GPIOs-all operating at 1.8V/3.3V. Used in server baseboard management controllers (BMC) and industrial IoT gateways for secure firmware boot and sensor telemetry aggregation.

For engineers reviewing the MA990004 datasheet, MA990004 pinout, MA990004 application, or MA990004 equivalent, key selection criteria include its VBAT-powered RTC and alarm timers, hardware root-of-trust via secure boot ROM, 84-pin WFBGA package with 1.8V GPIO compatibility, and integrated TACH/PWM fan control for thermal management in headless embedded systems.

Technical Context

The MA990004 implements a 32-bit ARM v7-M architecture with hardware FPU, NVIC supporting 240 interrupt sources and 8 priority levels, and chip-level interrupt aggregator to extend vector count. Its memory subsystem includes 416KB code SRAM and 64KB data SRAM, plus 128-byte battery-backed RAM accessible during deep sleep on 32.768 kHz clock.

Security is enforced through dedicated hardware engines: AES-128/192/256 with DMA interface, SHA-1/256/512 hash engine, RSA up to 4096-bit and ECC up to 640-bit, TRNG, monotonic counter, and immutable Boot ROM with SPI flash authentication. All cryptographic operations execute independently of the CPU core.

Key Specifications

Pinout & Package

MA990004 is housed in an 84-pin Wafer-Level Fine-Pitch Ball Grid Array (WFBGA) package with 0.5 mm pitch, optimized for space-constrained embedded platforms requiring low-profile mounting and thermal efficiency. Pin functions are multiplexed across GPIO, peripheral, and power domains, with default states defined per signal type (e.g., BGPO0 defaults to O2ma-Low).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CEC1702-84, MA990004 offers identical functionality and footprint but with Aetrix's supply chain assurance; versus STM32L4A6VGT6, it delivers hardware-enforced security, deeper sleep modes, and integrated fan/thermal control-critical for infrastructure-class embedded systems.

Availability

MA990004 is available at Aetrix Electronics and suitable for server BMCs, industrial gateways, smart building controllers, and medical power supervisors requiring stable component supply, long-term lifecycle support, and secure firmware execution.

Supply support for MA990004 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and security ICs for industrial, automotive, and communications markets.

The CEC1702 product line was designed specifically for secure, low-power embedded controller roles in IoT infrastructure-emphasizing hardware-rooted trust, VBAT-resident timing, and mixed-signal peripheral integration for autonomous system management.

FAQ

What is the primary function of the MA990004 in a server platform?

The MA990004 serves as the cryptographic embedded controller in server baseboard management controllers (BMC), handling secure boot, firmware integrity verification, real-time thermal monitoring via TACH/PWM, and VBAT-backed RTC operation. Its hardware AES/SHA/RSA engines accelerate cryptographic operations independently of the host CPU, enabling fast, tamper-resistant firmware updates and sensor data encryption within the MA990004 itself.

Does the MA990004 support both 1.8V and 3.3V I/O operation?

Yes, the MA990004 supports dual-voltage I/O: all 65 GPIOs are 1.8V-capable, and two separate power planes (VTR and VBAT) allow selective 1.8V or 3.3V operation for different peripheral groups. I2C ports, UARTs, and ADC inputs are explicitly rated for 1.8V logic levels, while over-voltage protected pins tolerate up to 5.5V when powered at 3.3V-enabling interoperability with legacy 3.3V or 5V peripherals without level shifters.

How does the MA990004 ensure secure firmware boot?

The MA990004 implements a hardware root-of-trust using its immutable Boot ROM, which authenticates external SPI flash images using SHA-256 before loading them into SRAM. It supports AES-256 encryption of the flash image and validates digital signatures against embedded public keys. This process occurs before any user code executes, ensuring that only cryptographically signed and unmodified firmware runs on the MA990004-preventing unauthorized or corrupted code execution at power-on.

Can the MA990004 operate in deep sleep mode while maintaining real-time functions?

Yes, the MA990004 maintains full RTC, week timer, hibernation timer, and VBAT-backed 128-byte RAM functionality during its deepest system sleep state, powered solely by the VBAT rail. It operates on the 32.768 kHz standby clock and can generate wake-up events with programmable intervals from 0.5 ms to 35 hours-enabling ultra-low-power periodic sensor polling or time-triggered tasks without host processor involvement.

What peripheral interfaces does the MA990004 provide for thermal management?

The MA990004 integrates two dedicated fan tachometer inputs (FAN_TACH0/FAN_TACH1) and seven 16-bit PWM outputs-including two assigned as GPWM0/GPWM1-enabling closed-loop fan speed control. Each tach input pairs with a PWM output to implement RPM-based feedback control with ±3% accuracy from 500–16,000 RPM, spin-up routines, ramp rate control, and aging/fault detection-all executed autonomously by the MA990004 without CPU intervention.