Microchip Technology MEC1701Q-C2-SZ

Overview

MEC1701Q-C2-SZ from Microchip Technology is an ARM Cortex-M4F-based embedded controller designed for notebook and tablet platform system management. It integrates secure boot, hardware cryptographic engines (AES-128/192/256, SHA-1–512, RSA/ECC), 256KB–480KB SRAM, 2KB EEPROM, and supports LPC/eSPI host interfaces with ACPI compliance. It delivers real-time keyboard scan, fan control, RTC, and battery-backed wake-up in low-power VTR/VBAT domains.

For engineers reviewing the MEC1701Q-C2-SZ datasheet, MEC1701Q-C2-SZ pinout, MEC1701Q-C2-SZ application, or MEC1701Q-C2-SZ equivalent, key selection criteria include its dual-voltage GPIO support (1.8V/3.3V), eSPI/LPC interface flexibility, hardware Root of Trust, 148 GPIO count, and integrated 11-channel PWM + 3-tach fan control for thermal management in ultra-thin client platforms.

Technical Context

The MEC1701Q-C2-SZ implements a tightly coupled ARM Cortex-M4F core with FPU, NVIC supporting 240 interrupt sources, and JTAG/SWD debug infrastructure including DWT, FPB, ITM, ETM, and TPIU trace modules. Its memory subsystem includes boot ROM, configurable SRAM blocks (224KB/288KB/416KB + 32KB/64KB), and 128-byte VBAT-SRAM.

It features five ACPI-ECI instances, eight 8042-style host message interfaces, four SMBus 2.0 controllers (1MHz max, DMA-driven), three PS/2 controllers (five ports total), and dual BC-Link buses for companion device expansion - all operating across VCC (runtime), VTR (standby), and VBAT (hibernation) power planes.

Key Specifications

Pinout & Package

MEC1701Q-C2-SZ is housed in a 144-pin WFBGA package (RoHS-compliant, 6 mm × 6 mm, 0.5 mm pitch), with ball map defined per DS00002206H Section 2.0. Power domains include VCC (main), VTR (standby), and VBAT (battery backup). I/O voltage rails are configurable per group: 1.8V or 3.3V.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MEC1701Q-C2-SZ, the MEC1701Q-C2-TN offers expanded memory and I/O in a larger footprint, while the IT5570E provides basic EC functionality at lower cost but lacks ARM performance, cryptographic acceleration, and eSPI readiness-making MEC1701Q-C2-SZ optimal for next-gen secure, thermally adaptive client platforms.

Availability

MEC1701Q-C2-SZ is available at Aetrix Electronics and suitable for ultra-thin notebook platform design, enterprise thin client deployment, and medical handheld terminal development requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MEC1701Q-C2-SZ 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, consumer, and communications markets with vertically integrated silicon and software tools.

The MEC170x product line is engineered as a highly configurable, mixed-signal embedded controller family targeting notebook and tablet platform power management, I/O expansion, and hardware-rooted security-enabling split-architecture Advanced I/O Controllers via BC-Link.

FAQ

What is the primary function of the MEC1701Q-C2-SZ in a notebook system?

The MEC1701Q-C2-SZ serves as the system's embedded controller, managing keyboard/mouse PS/2 interfaces, thermal regulation via 11 PWMs and 3 tach inputs, ACPI power state transitions (S0–S5), RTC, and secure boot. It acts as the hardware root of trust, authenticating firmware images from external SPI flash before execution-ensuring integrity from power-on reset onward. Its integration reduces reliance on external components for platform control.

Does the MEC1701Q-C2-SZ support both LPC and eSPI host interfaces simultaneously?

No-the MEC1701Q-C2-SZ supports either LPC or eSPI as its primary host interface, selected at boot time via configuration fuses or strap pins. Both protocols are implemented on-die and electrically isolated; concurrent operation is not supported. The choice depends on platform chipset compatibility: LPC for legacy Intel PCH, eSPI for newer platforms requiring higher bandwidth and reduced pin count. MEC1701Q-C2-SZ firmware must be configured accordingly.

What voltage levels does the MEC1701Q-C2-SZ support for GPIO operation?

The MEC1701Q-C2-SZ supports dual-voltage GPIO operation: groups can be independently configured for 1.8V or 3.3V I/O logic levels. Core logic and GPIO drivers are compatible with both, while analog and PLL circuits require 3.3V only. This flexibility allows direct interfacing with 1.8V sensors and 3.3V legacy peripherals without level shifters-critical for space-constrained notebook designs where mixed-voltage signaling is common.

How does the MEC1701Q-C2-SZ implement hardware-based security?

The MEC1701Q-C2-SZ embeds a comprehensive hardware security suite: a secure boot ROM enforcing immutable code execution, AES-128/192/256 and SHA-1/256/384/512 crypto engines, RSA-2048/ECC-640 public-key accelerators, a true random number generator (1K-bit FIFO), and monotonic counters. These features enable authenticated firmware loading, encrypted SPI flash storage, and tamper-resistant logging-all without CPU intervention, reducing attack surface and latency in security-critical boot paths.

What is the maximum number of GPIOs available on the MEC1701Q-C2-SZ?

The MEC1701Q-C2-SZ provides up to 148 general-purpose I/O pins, as confirmed in Table 1-1 of DS00002206H. These include glitch-filtered inputs, programmable drive strength/slew rate, and 6 battery-backed outputs. Eight of these support pass-through functionality for board-level signal routing. All GPIOs operate at either 1.8V or 3.3V, enabling flexible integration with diverse sensors, switches, LEDs, and communication peripherals in high-density client platforms.