Recommended Free Tools
Lockstep architecture primarily enhances an MCU’s ability to detect certain processor faults; it does not inherently make a program run faster. Two processor channels execute the same instructions, and hardware checks whether their behavior matches. That redundancy supports safety-related designs, while reducing the processing capacity available for separate work unless the MCU also has independent cores.
How lockstep works
A lockstep design pairs a main processor with a checker processor. Both run the same program flow, and a comparator checks that their behavior agrees. If it detects a mismatch, the MCU can report or react to the discrepancy according to its implementation.
For example, Microchip documentation says its two identical CPUs execute the same program flow and that a mismatch triggers a Machine Check Reset; its comparator is outside the main CPU. Arm’s Cortex-M23 application note likewise describes two processor instances executing identical code in tandem and checking whether their outputs are equivalent.
The comparison boundary is device-specific. Lockstep does not automatically mean every peripheral, memory path, or other system element is duplicated. ST’s SPC58 reference manual describes replicated safety-relevant processing elements that behave as one core from the software perspective. Its SPC57 K line, by contrast, illustrates a main core in lockstep with a checker alongside a separate I/O core.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
What lockstep changes about performance
It spends redundant compute on checking
The checker repeats the main processor’s work rather than executing a separate application thread. Lockstep’s direct benefit is therefore fault detection and support for safety-related system design, not general acceleration of an individual program. Compared with split operation, using processors in lockstep can leave fewer resources for independent computation; the actual throughput tradeoff depends on the device and workload.
A specific non-MCU comparison illustrates why figures must be kept in context: AMD’s WP565, released December 18, 2025, reports up to 200k DMIPS in split mode and up to 100k DMIPS when all clusters are configured in lockstep for its described eight-core Cortex-A78AE arrangement. This is not an MCU benchmark or a universal two-to-one lockstep penalty.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Independent cores can preserve system-level compute
Some designs pair checked processing with independent cores that can handle other work. ST describes an arrangement with a lockstep processing core and an I/O processor core for distinct computational and peripheral tasks. Renesas describes the RH850/U2A as having up to four 400 MHz CPU cores in a dual-core lockstep structure. Such arrangements can provide compute capacity beyond the lockstep pair, but do not change the fact that the paired processors repeat work.
Vendor claims are design-specific
Texas Instruments says its Hercules architecture can provide safety response “without any additional performance impact.” Treat that as a claim about TI’s design, not a general property of lockstep. A design’s response time and throughput depend on how its safety mechanisms are implemented and on the workload being run.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
How to evaluate lockstep in an MCU
When comparing MCUs or operating modes, focus on the architecture and the intended workload rather than assuming that “dual core” means twice the application performance. Check:
- Independent compute: How many cores remain available to run separate tasks in the selected mode?
- Comparison boundary: Which processors and other system elements are included in the lockstep checks?
- Mismatch response: How does the device report a discrepancy, and what action does it take?
- Safety evidence: What safety use cases does the vendor support, and what documentation is available for the specific device?
- Workload performance: What throughput does the MCU deliver on the intended application in the selected mode?
The cited vendor material does not establish comparable workload benchmarks across product families, so figures from different architectures should not be used to rank them directly.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
