Voltage Regulator Has Low Quiescent Current

Diodes Incorporated has introduced the AP7381. Operating from a wide input voltage spanning 3.3 V to 40 V, this positive voltage regulator offers ultra-low quiescent current and high accuracy, making it well-suited for use in a variety of applications ranging from USB and portable devices to energy meters and home automation.

MFG_AP7381_SOT89The AP7381 is offered with fixed output voltages of 3.3 V or 5 V to power standard logic device supplies and I/O levels and can operate from an input voltage between 3.3 V and 40 V, which covers most common system power rails. The device provides excellent line and load regulation and features a low dropout voltage of typically 1,000 mV for a 3.3 V output device operating at an output current of 100 mA. An internal voltage reference ensures output accuracy at room temperature is maintained within ±2%.

A low quiescent current of just 2.5 µA minimizes standby power in low-power systems and extends the life of battery-operated products. The AP7381 has a built-in current limit and an over-temperature protection (OTP) function and also features over-current protection, provided by an internal current limit circuit. The AP7381 is available in a SOT89 package (on tape and reel) and in a TO92 package (ammo packed).

Diodes Incorporated | www.diodes.com

3.5″ Board Designed Rugged Environments

AAEON has launched the GENE-SKU6 W1, a 3.5-inch subcompact board with the specifications needed to handle harsh, unstable conditions. When hardware is used for outdoor, factory automation, or in-vehicle applications, you can’t always be sure that its DC input will remain stable. Because businesses can’t afford for their systems to shut down, they need computers that can withstand power fluctuations and keep on running. With that in mind, the GENE-SKU6 W1 has a DC input range of 9 to  36 VDC, so it takes power drops and spikes in its stride and continues operating.

pgal_160922_8bg2utThis rugged subcompact board also has a WiTAS 1 wide-temperature rating, meaning it’s guaranteed to run smoothly in environments as cold as -20°C and as hot as 70°C. This capability is achieved through intelligent design, low-power components and an effective heatsink. Those design features enable the GENE-SKU6 W1 to function as a reliable, fanless solution.

The board’s features include support for 4K resolution and independent DP, DVI, and LVDS display outputs. It has Mini-card and mSATA slots, four USB 3.0 and two USB 2.0 ports, four COM ports and an additional BIO interface enabling board-to-board connection.

AAEON | www.aaeon.com

Fanless SBC Targets Industrial IoT

Technologic Systems is now shipping its newest single board computer, the TS-7553-V2. The board is developed around the NXP i.MX6 UltraLite, a high performance  processor family featuring an advanced implementation of a single ARM Cortex-A7 core, which operates at speeds up to 696 MHz. While able to support a wide range of embedded applications, the TS-7553-V2 was specifically designed to target the industrial Internet of Things (IIoT) sector.

ts-7553-v2The TS-7553-V2 was designed with connectivity in mind. An on-board Xbee interface, capable of supporting Xbee or NimbleLink, provides a simple path to adding a variety of Wireless interfaces. An Xbee radio can be used to link in with a local 2.4GHz or sub 1 GHz mesh networks, allowing for gateway or node deployments. Either Digi or NimbleLink offer cellular radios for this socket, providing cellular connectivity for applications such as remote equipment monitoring and control. There is also the option for a cellular modem via daughter card. This allows transmission of serial data via TCP, UDP or SMS over the cellular network. The TS-7553-V2 also includes an on board WiFi b/g/n and Bluetooth 4.0 option, providing even more connectivity.

Further radio expansion can be accomplished with the two internal USB interfaces (one on a standard USB Type A connector, and the second on simple pin headers). The USB interfaces enable support for multiple proprietary networks via a dongle or USB connected device. This provides the opportunity to run mesh, LoRa, ZigBee, automotive WiFi or other protocols with the TS-7553-v2 . All of these radio options combined with the on board 10/100Base-T Ethernet create the opportunity to communicate seamlessly with up to 5 different networks simultaneously from a single point.

The TS-75553-V2 supports standard interfaces including:

  •     10/100 Ethernet
  •     TTL UART
  •     4 USB ports (3 host interfaces and, 1 device)
  •     3 RS-232 Serial/COM ports
  •     RS-485 port
  •     CAN bus
  •     Up to 5 GPIO

A Nine-Axis Micro-Electro-Mechanical System (MEMS) motion tracking device containing a gyroscope, accelerometer and compass are optional on-board in for asset management, fleet management and other applications which would require sensing motion or vibration in the environment.

A low cost monochrome 128x64px LCD with 4 button keypad is available for Human Machine Interface (HMI) applications.  The keypad offers intuitive operation using 4 tactile function keys and the LCD is ideal for simple visualization tasks, even in harsh environments.  If HMI is not a consideration compact, lightweight, rugged enclosures are available to contain your gateway in a secure fanless enclosure. Both enclosures are DIN mountable.

Technologic Systems has taken the lead in combating read/write errors to memory that can prove fatal to Operating Systems. TS-SILO is an optional feature which will provide up to 30 seconds of reserve power in the event of a power failure. This precious extra time gives the board time to gracefully power down and ensures file system integrity. Additionally, for heavy data logging applications The TS-7553-V2 is the first SBC from Technologic Systems to include Ferroelectric RAM (FeRAM or FRAM). FeRAM advantages over flash include: lower power usage, faster write performance and a much greater maximum read/write endurance, allowing a user to keep running data logs without prematurely wearing out their flash memory. Combined these two features provide you with insurance from abrupt power loss, read/write errors and startup difficulties.

Applications with strict low power requirements will appreciate the work that’s been done to reduce power consumption to less than 2 W in typical conditions and a 9 mW sleep mode. Power over Ethernet (PoE) is supported via a daughter card, if desired.

Development can begin out-of-the-box with pre-installed Linux and utilities for controlling DIO, UARTS, CAN bus, and more. A complete board support package is provided, as well as access to our software repository and online support. Third party application support can be provided via the Technologic Systems’ Partner Network.

Technologic Systems | www.embeddedARM.com

COM-Based SBCs Offer High I/O Density

Diamond Systems has released its ultra-small COM-based ZETA single board computer family. Highlights include interchangeable COM Express COMs for scalability and long product life, ultra- compact size and an rich amount of I/O, including a complete high-quality analog and digital data acquisition subsystem.

Designed in the COM Express Mini Type 10 form factor (84 mm x 55 mm / 3.3 in. x 2.2in.), the Zeta family offers performance scalability due to its use of COM Express CPU modules. Three processor options are currently available: Intel “Bay Trail” E3825 dual-core 1.33 GHz CPU with soldered 2 GB RAM; Intel “Apollo Lake” E3940 quad core 1.60 GHz CPU with soldered 4 GB RAM; and Intel “Apollo Lake” N4200 quad core 1.1 GHz (burstable to 2.5 GHz) CPU with soldered 8 GB RAM.

zeta-enlargedThe use of interchangeable CPU modules in the increasingly popular COM Express Mini Type 10 format enables Zeta to serve applications across a wide spectrum of price and performance needs. It also offers customers the longest possible product lifetime by vastly simplifying migration to a new CPU when the current one reaches its end of life. Zeta is an excellent choice for applications with expected lifetimes of 10 or more years, including military, medical, and transportation.

Zeta’s two-board COM + baseboard construction yields the highest feature density possible in a given footprint. The COM provides the core CPU functions, while the baseboard provides the “final inch” for all the system I/O plus the data acquisition subsystem, power supplies, and expansion sockets. Zeta provides as much as a 60% reduction in size compared to boards in larger form factors offering the same level of I/O.

Zeta’s impressive I/O list includes the following:

  • VGA display and Single-Channel LVDS port
  • Dual Gigabit Ethernet
  • 4 USB 2.0 Ports + 1 USB 3.0 port
  • 4 RS-232/422/485 ports with software-programmable protocol and termination
  • 16 digital IlO lines
  • Optional complete analog and digital data acquisition system
  • Integrated wide-range 6 V to 36 V power input circuit

Zeta is available in two I/O configurations, digital I/O only or digital + analog I/O. The DIO only circuit offers 16 DIO lines with selectable 3.3V/5V logic levels. The full circuit includes 16 channels of 16-bit A/D, 4 channels of 16-bit D/A, 27 digital I/O lines with selectable 3.3V/5V logic levels, and 8 32-bit counter/timers, all supported by Diamond’s free, industry-leading Universal Driver data acquisition programming library. An interactive graphical control panel for Windows and Linux is also provided to control all data acquisition features.

Zeta offers multiple options for system expansion and mass storage. It includes a PCIe Minicard / mSATA socket and a micro-SD socket. A unique expansion connector enables the installation of a daughterboard that contains an M.2 SATA SSD socket, a second PCIe Minicard socket, HD audio and 16 additional GPIO lines.

A built-in heat spreader efficiently removes heat from the SBC to keep the processor and all internal electronics cooler for improved reliability. The bottom-side mounting configuration of the heat spreader provides a secure and convenient mounting system for the board. It also simplifies the installation of I/O expansion modules by eliminating interference or airflow problems that can occur with traditional heat sinks. All three models of Zeta are tested for operation over the full industrial temperature range of -40°C to +85°C, making Zeta well suited for vehicle applications.

Diamond Systems | www.diamondsystems.com

Fanless EPIC SBC Handles Extreme Temps

AAEON has launched the EPIC-BT07W2 SBC that supports the EPIC form factor and features an industrial-grade thermal range of -40°C to 85°C. The EPIC-BT07W2 is a fanless solution like the rest of AAEON’s EPIC line, and provides high environmental resilience with its wide-temperature design. The CPU is located at the solder side of the board to facilitate further thermal solutions, and comes with a rugged aluminum heat spreader that provides maximum airflow and temperature control. A heatsink is also available as an accessory.

tio_170919_7nks33PCI-104 architecture expansion enables daughter boards to be stacked atop on the main board, minimizing lateral space and facilitating maximum flexibility, as well as supporting legacy IO. The EPIC-BT07W2 can be seamlessly integrated into pre-existing hardware such as panel screens and mini PCs. It is also ideal for IoT uses, and is designed for minimum maintenance and maximum ruggedness.

Features include:

  • Onboard Intel Atom E3845/ Celeron J1900, N2807 Processor SoC
  • DDR3L 1,333 MHz SoDIMM x1, Up to 8 GB
  • LVDS 24-bit Dual Channel
  • Dual Display Configuration: VGA+ LVDS, VGA + HDMI or HDMI + LVDS
  • SATA 3.0 Gb/s x 1, mSATA/ MiniCard x 1, Micro SD Slot x 1 (E3800 Series Only)
  • USB 3.0 x 1, USB2.0 x 5, RS-232 x 4, RS-232/422/485 x 2 (COM2, COM3)
  • MiniCard x 1, SIM x 1, PCI-104 (Optional)
  • 16-bit Digital IO/LPT, SMBus x 1, I2C (Optional)
  • Audio 2 Ch, 2 W Audio Amp., TPM (Optional), Touch Controller (Optional)
  • 9-24V DC Wide Range or 12 VDC Power Input
  • SoC Processor on Solder Side Design

AAEON | www.aaeon.com

USB Data Acq System Features Simple Expansion

DATAQ Instruments has announced the release of its model DI-2108-P USB data acquisition (DAQ) system with 16-bit ADC resolution, programmable gain and ChannelStretch technology. The model DI-2108-P provides eight analog input channels each with 2.5-, 5- and 10-volt unipolar and bi-polar programmable measurement ranges. DATAQ Instruments di2108-product-photo-press-releaseThe DI-2108-P also provides 7 digital ports, each configurable as an input or a switch. Two ports can be programmed as counter and frequency measurement inputs. The instrument’s maximum sampling throughput rate is 160 kHz.

The ChannelStretch feature of the DI-2108-P makes channel expansion as easy as adding another device. Plug a second device into a computer and double the channel count of both analog and digital channels. Using USB hubs, plug up to sixteen devices into a single PC for a maximum count of 128 analog and 112 digital channels. And all of them are acquired synchronously at a maximum sample throughput rate of at least 480 kHz. DI-2108-P software support includes ready-to run WinDaq data acquisition software, .Net class, ActiveX controls and a fully documented communication protocol to deploy the instrument on any platform. The unit is priced at $349.

DATAQ Instruments | www.dataq.com

Buck Converter Extends Battery Life of USB Type-C Gear

Maxim Integrated Products has announced the MAX77756, a 24 V, 500 mA, low quiescent current (IQ) buck converter. The product targets developers of multi-cell, USB Type-C products in need high current, dual inputs and I2C support. USB Type-C products must generate an always-on 3.3 V rail to detect USB insertions. Products utilizing the Power Delivery (PD) voltage range (5 V to 20 V) can generate an always-on (1.8 V /3.3 V /5.0 V) digital supply MAX77756_EVKit_imagerail for the port controller using the MAX77756 step-down converter. In addition, the MAX77756 has a 2 0 μA quiescent current that extends battery life by reducing idle power consumption. To simplify the system design, the MAX77756 has a dual input ideal diode ORing circuit that allows the chip to power from the external USB source if the battery is empty.

Multi-cell battery-operated devices—such as ultrabooks, laptops, tablets, drones and home automation appliances—can easily evolve to Type-C with PD using the flexible MAX77756 power supply. The MAX77756 has a unique combination of wide input voltage range, low quiescent current, higher current load, dual input, and I2C for flexibility and programmability. There is also a default power mode if customers do not want to use the I2C bus. The MAX77756 is a robust IC with short-circuit and thermal protection, 8ms internal soft-start to minimize inrush current, proven current-mode control architecture, and up to 26V input voltage standoff.

Key Advantages

  • Low quiescent current: 1.5 μA Buck and 20 μA MUX for always-on operation
  • High efficiency: Up to 92% with integrated power MUX
  • Small solution size: 2.33mm x 1.42mm 15-bump WLP; no external Schottky array needed
  • Wide input voltage: Operates on full VBUS range (5 V – 20 V) and VBATT (2S, 3S, 4S Li+)

MAX77756 is available from stock and priced at $0.65 (10,000+)..An evaluation board MAX77756EVKIT# (see photo) is available from stock and priced at $70

Maxim Integrated Products | www.maximintegrated.com

USB Protocol Analyzer Sports Type-C Connection

Saelig has announced the availability of the Mercury T2C USB 2.0 and Power Delivery Protocol Analyzer that offers the newest USB Type-C connection. The Mercury T2C is a small and affordable hardware-based USB protocol analyzer. Saelig claims it is the industry’s first ultra-portable, hardware-based, USB and Power Delivery protocol analyzer. It combines the de-facto standard CATC Trace display, comprehensive USB class decoding, and PD 2.0 protocol analysis. The pocket-sized, bus-powered Mercury T2C sits in-line between host and device and provides transparent capture of all USB transactions.

Saelig t2c

With event triggering and real-time spool-to-disk capture the T2C has advanced capabilities that reduce time to market for USB systems and software. It graphically decodes logical protocol events to show the underlying transactions and packets. Decoding of upper level transactions allows users to see logical protocol events within the trace, eliminating the manual decoding of device-specific commands.

The Mercury T2C includes hardware-based event triggering, 256 Mbytes of memory, and spool-to-disk capture for extended recording. It includes cables to interface directly with USB 2.0 devices and the new Type-C devices. Available with USB 2.0 only, USB PD only, or both USB and PD analysis, the Mercury T2C features non-intrusive probing to preserve real-world signal and timing conditions.

Saelig | www.saelig.com

Single-Chip Battery Controllers Enable USB Power Delivery

Texas Instruments (TI) has introduced a pair of highly flexible, single-chip buck-boost battery charge controllers for one- to four-cell (1S to 4S) designs. The bq25703A and bq25700A synchronous charge controllers support efficient charging through USB Type-C and other USB ports in end equipment ranging from notebooks and tablets to power banks, drones and smart home applications. To learn more about the bq25703A and bq25700A.

TI bq25703A-bq25700A

Supporting both I2C and SMBus interfaces, the bq25703Aand bq25700A feature a new advanced battery algorithm enabling full power output by adding intelligence to battery charging through maximum power point tracking technology. The unique algorithm, referred to as input current optimization (ICO), automatically detects the full capacity of input power to optimize current, while maintaining consistent system and charging current to ensure the utilization of maximum input power.

Key features and benefits

  • Input source flexibility: The device’s USB Power Delivery compatibility offers an input voltage range from 3.5 V to 24 V, which designers can use in multiple ports including USB 2.0, USB 3.0 and the newest standard, USB Type-C.
  • Wide USB On-the-Go (OTG) output compatibility: The new charge controllers support input-ready devices from 5 V to 20 V and adjustable output for USB OTG with programmable current regulation.
  • Compact configurations: TI’s new battery-charging algorithm and intelligent detection features enable the battery charge controllers to support wide input and output voltage ranges and more compact adaptor designs.
  • Seamless transition between different modes : The devices support 1S to 4S batteries and an efficient transition between buck and boost operation without any dead zone.

Designers can use the bq25700A evaluation module (EVM) to easily evaluate device features and performance and speed time to market. The bq25703A EVM and the bq25700A EVM  are available from the TI store and authorized distributors for US$149.00. Designers can use the WEBENCH Battery Charger Designer to calculate the efficiency of the battery charge controller.

The bq25703A and bq25700A charge controllers are now available through the TI store and authorized distributors. Offered in a 4-mm-by-4-mm, 32-pin quad flat no-lead (QFN) package, the controllers are priced at US$2.20 in 1,000-unit quantities.

Texas Instruments | www.ti.com

Promoter Group Announces USB 3.2 Spec Update

The USB 3.0 Promoter Group has announced the pending release of the USB 3.2 specification, an incremental update that defines multi-lane operation for new USB 3.2 hosts and devices, effectively doubling the bandwidth to extend existing USB Type-C cable performance. During the upcoming USB Developer Days 2017 event, the promoters will provide detailed technical training covering USB 3.2, fast charging advancements in USB Power Delivery, and other topics.

20170726120126_USB-Type-cFrontWeb

While USB hosts and devices were originally designed as single-lane solutions, USB Type-C cables were designed to support multi-lane operation to ensure a path for scalable performance. New USB 3.2 hosts and devices can now be designed as multi-lane solutions, allowing for up to two lanes of 5 Gbps or two lanes of 10 Gbps operation. This enables platform developers to continue advancing USB products by effectively doubling the performance across existing cables. For example, a USB 3.2 host connected to a USB 3.2 storage device will now be capable of realizing over 2 GB/sec data transfer performance over an existing USB Type-C cable that is certified for SuperSpeed USB 10 Gbps.

Key characteristics of the USB 3.2 solution include:

– Two-lane operation using existing USB Type-C cables

– Continued use of existing SuperSpeed USB physical layer data rates and encoding techniques

– Minor update to hub specification to address increased performance and assure seamless transitions between single and two-lane operation

For users to obtain the full benefit of this performance increase, a new USB 3.2 host must be used with a new USB 3.2 device and the appropriate certified USB Type-C cable. This update is part of the USB performance roadmap and is specifically targeted to developers at this time. Branding and marketing guidelines will be established after the final specification is published. The USB 3.2 specification is now in a final draft review phase with a planned formal release in time for the USB Developer Days North America event in September 2017.

The USB 3.0 Promoter Group, comprised of Apple, Hewlett-Packard, Intel Corporation, Microsoft Corporation, Renesas Electronics, ST Microelectronics, and Texas Instruments, continues to develop the USB 3.x family of specifications to meet the market needs for increased functionality and performance in SuperSpeed USB solutions. Additionally, the USB 3.0 Promoter Group develops specification addendums (USB Power Delivery, USB Type-C, and others) to extend or adapt its specifications to support more platform types or use cases where adopting USB 3.x technology will be beneficial in delivering a more ubiquitous, richer user experience.

USB 3.0 Promoter Group | www.usb.org

Triple-Output Power Supplies Feature Modern Interfaces

Keysight Technologies has announced the introduction of the E36300 Series triple-output programmable DC power supplies. With a large color display, intuitive user interface, modern device connections via LAN (LXI, USB and optional GPIB), the E36300 matches the performance of more expensive system power supplies. The E36300 Series’ low “normal mode” noise specifications assure quality power for precision circuitry applications, enabling engineers to power their designs with confidence. In addition, the power supplies are acoustically quiet. Each model provides excellent line/load regulation of 0.01 percent, fast transient response time of less than 50 ms, low-range current measurement, and over-voltage, over-current and over-temperature protection to prevent damage to the device under test.

Keysight Technologies-E36300

Keysight’s BenchVue software supports the E36300 Series, enabling control of power supplies to set parameters and status alerts, visualize power output, and log changing voltage and current over time. The included Test Flow capabilities let users quickly automate power-supply setups and measurements into test sequences. The E36300 Series is available to order now. The list price starts at $1,100.

Keysight Technologies | www.keysight.com

USB Microphone Array Serves Voice-Activated Applications

The new miniDSP UMA-8 is a high-performance yet low-cost multichannel USB microphone array built around XMOS multicore technology, designed for voice-recognition application development. Seven high-performance MEMS microphones are configured in a circular arrangement to provide high-quality voice capture for a wide range of applications. Leveraging the onboard DSP processing, the UMA-8 supports voice algorithms including beamforming, noise reduction, acoustic echo cancellation, and de-reverb.

miniDSPUMA 8BoardFlight

Developed with applications in voice-activated control, smart assistants, robotics, conferencing, and more in mind, the UMA-8 pocket-size platform targets both DIYers and the OEM market, and was engineered for flexibility in firmware, software and hardware. For advanced users, full control and configuration of the DSP array processing parameters are available with a real-time GUI. This can be used to fine tune the various algorithms: acoustic echo cancellation, noise reduction, voice activation detect, and so on, dramatically improving voice pickup.

The UMA-8 costs $95. Step-by-step application notes are available for setup and configuration of the UMA-8 with the most common smart assistants currently available, including Amazon Alexa Voice + Raspberry Pi, Microsoft Cortana, and Apple Siri. miniDSP will be expanding those application notes in the future.

miniDSP | www.minidsp.com

Renesas New R9J02G012 Controller Enables Device-to-Device Authentication in Support of Safer USB Power Delivery Ecosystem

Renesas Electronics announced its new R9J02G012 USB Power Delivery (USB PD) controller intended for use in a wide range of USB Power Delivery products employing direct current (DC) power including AC adapters, PCs, smartphones, other consumer and office equipment, and toys. The new R9J02G012 supports both USB Power Delivery Rev. 3.0 (USB PD 3.0) and USB Type-C Authentication Rev 1.0, which enables device-to-device authentication.

The demand for fast charging mobile devices is growing, driving increased demand for high DC power delivery (e.g. 100W). Previously, system manufacturers frequently implemented proprietary fast-charging methods using USB Micro-B connectors. However, with recent smartphone charging/battery incidents, it is critical to offer a safe ecosystem of USB PD compatible products. The USB Implementers Forum (USB-IF), an industry-leading technology consortium, has standardized the following specifications to provide open, unified and interoperable technologies to fulfill these market needs:

1) USB Type-C Rev 1.2 Specification: For simpler, easier physical connection of cables, chargers and devices

2) USB Power Delivery Rev 3.0 Specification: For higher power delivery protocols with additional performance, safety and upgradability features like PD firmware update

3) USB Type-C Authentication Rev 1.0 Specification: For device-to-device authentication allowing system manufacturers to implement additional charging policies for trusted high-power charging over USB Type-C

As a long-time supporting member and a board member for USB Implementers Forum, Renesas has adopted all three standards. The new R9J02G012, introduced during Computex Taipei 2017, is a flexible, small-package USB PD controller for USB Type-C port control on any USB PD devices. All connecting ports to these USB PD devices with the R9J02G012 will be able to electronically verify and trust its authenticity based on the certificates and public key infrastructure (PKI) defined in the USB Type-C Authentication specification. This mechanism allows system manufacturers to implement policies to examine the genuine origin of the connected PD devices such as cables and chargers before a high-power charging of (e.g., 20V at 3A) is executed.

The R9J02G012 integrates support for the USB PD 3.0 and USB Type-C Authentication standards in a single package, where previously each required a separate chip. It is available in an easy-to-mount QFN package as well as the more compact BGA package, reducing the mounting area in cables or electronic devices. The board mounting area is less than 50 percent the area required when using the existing Renesas R9A02G011.

The R9J02G012 also supports the Power Delivery Firmware Update (PDFU) Specification, Revision 1.0. This optional PD feature is an open standard enabling firmware updates of the device via a USB Type-C cable.

Samples of the R9A02G011 are available from June 2017. Mass production is scheduled to begin in the beginning of January 2018. Renesas plans to expand its range of reference designs for applications such as USB Type-C power banks and mobile batteries by combining the R9J02G012 with power products from Renesas and Intersil Corporation, which was acquired by Renesas in February 2017. With the introduction of the R9J02G012, system manufacturers can easily construct a trusted power charging ecosystem of USB PD products based on the USB PD and USB Type-C Authentication standards.
renesas.com

Tracealyzer 3.1 Offers Support for Trace Streaming Over USB

Percepio AB recently released Tracealyzer 3.1, which is a trace tool that supports RTOS trace using just a standard USB cable. You can increase your development speed by using Tracealyzer for debugging, validation, profiling, documentation, and training. Percepio-Tracealyzer

The trace recorder library is now easier to configure for streaming over custom interfaces, and includes support for USB streaming on STM32. (It can be adapted for other microcontrollers.) USB offers excellent performance for RTOS tracing and over 600 KB/s has been measured on an STM32 using USB 2, several times more than required. Other stream ports include TCP/IP and SEGGER J-Link debug probes. Tracealyzer 3.1 can also receive trace streams via Windows COM ports (e.g., from USB CDC connections), UART connections, or any virtual COM port provided by other target interfaces.

Tracealyzer 3.1 can identify memory leaks in systems that use dynamic memory allocation. It can record memory allocation events (e.g. malloc, free) from multiple operating systems, and it can display such allocations that have not been released. Since the memory allocation events are linked to the task trace, you quickly find the context of the allocation and investigate the problem. The recorder library simplifies integration and now provides a common API for both streaming and snapshot recording.

 

Source: Percepio AB

 

New USB Micromodule Transceiver Protects Against High Voltages

Linear Technology Corp. recently introduced the LTM2894 USB µModule (micromodule) reinforced isolator that guards against ground-to-ground voltage differentials and large common-mode transients. With a rugged interface and internal isolation, the LTM2894 is well suited for implementing USB in harsh environments where protection from high voltages is needed.LTM2894

The LTM2894’s features, specs, and benefits:

  • Isolated USB Transceiver: 7,500 VRMS for 1 minute
  • USB 2.0 Full sspeed and low speed compatible
  • Auto-configuration of USB bus speed
  • 4.4-to-36 V VBUS and VBUS2 opperating range
  • 3.3-V LDO Output supply signal references: VLO, VLO2
  • 50-kV/µs Common mode transient immunity
  • ±20-kV HBM ESD on USB interface pins
  • 1414 VPEAK Maximum continuous working voltage
  • 17.4-mm Creepage distance
  • 22 mm × 6.25 mm BGA Package

Source: Linear Technology