Products
Amphion’s EMI Wind-Lok, a reverse bayonet connector, is designed to deliver high power from source to load
Tell me about JTAG/boundary-scan! Boundary-scan, also known as JTAG or IEEE Std. 1149.1, is a serial interface that gives access to the special embedded logic built-in into many of today’s integrated circuits (ICs). JTAG/boundary-scan provides a quick and easy method for testing electronic Printed Circuit Board Assemblies or PCBAs for manufacturing faults. It is also widely used for programming ICs such as cPLDs, FPGAs and flash memories on the circuit boards in production as well as after product manufacture if software/ firmware updates are needed.
Basic idea
The basic idea behind boundary-scan is that with internal cells you don’t need external probing access to the pin connections you wish to test. If you can drive the output pin of Device A using a built-in drive cell, and read the result on the input pin of Device B with a built-in sense cell, you can perform the desired test.
BSDL File The boundary-scan logic of a device is described in a single model file known as BSDL file (Boundary-Scan Description Language), which is also part of the IEEE 1149.1 standard. For every device type, the manufacturer of that device must provide a BSDL file. Using the description in this file software tools can analyze the boundary-scan logic in a device and automatically generate tests or other boundary-scan applications, such as device programming, for a PCBA
Applications The boundary-scan logic on a PCBA can be used for testing connections. Not only direct connections between boundary-scan devices, but also connections through transparent devices such as series resistors and buffers for example, as well as connections through logic gates. The presence of pull-up and pull-down resistors and connections to memory devices and microprocessor peripherals can also be tested
Hardware and Software
Hardware and software is needed to control the boundary-scan logic and drive data through the TAP (Test access port) and the registers in the chains. Special, advanced software can automatically generate JTAG/boundary-scan applications from CAD data and device models. A broad range of hardware and software tools is available with different capabilities and performance. This gives you the possibility to configure the boundary-scan solution that optimally fits the needs of your application area. For example tools for hardware debugging during prototype bring-up, testing and device programming in production, or repair and device re-programming for product upgrades in service.
Read more in depth For more in-depth information, download the white paper:
Selwyn Electronics As a specialist supplier of connectors and cable assemblies for over 30 years, and with particular emphasis on engineering support, Selwyn Electronics has always kept up to date with market trends and new technologies, to ensure that their range of products evolves with these changes. Below are just a part of the extensive range that they can offer.
Waterproof Connectors • IP65 to IP69 rated • Plastic and metal • Circular, USB, RJ45 • 2-50 Amp rated • Moulded assemblies
Circular connectors • Plastic or metal housings • Vibration resistant • IP50 and IP68 • Cable assembly service • Various polarising options
Cable Assemblies
• 2 factories, UK and Far East • Both facilities ISO9001 approved • 100% electronically tested • Test certificates on request • Complete cable solutions
BGA Sockets and Adaptors • Various locking systems • 0.5-1.5mm pitch • Custom footprints • Compression contacts • Socket/adaptor systems
www.selwyn.co.uk
How small? How thin? How flexible? New Miniature Flexible RTD Temperature Sensors from Heraeus Nexensos
Heraeus Nexensos introduce a new miniature, ultra-thin and flexible temperature sensor element which is only 50 microns thin! The MicroRTD has several footprints down to 0.6mm x 0.3mm (0201) facilitating applications for temperature sensing in the smallest of electronic devices. Ultrasmall, the MicroRTD
can be positioned in-between thin layers or into confined areas, opening up exciting developments in next generation batteries, micro-processors and consumer electronics. Additionally, with its flexible, bendable structure opportunities are available in skin thermometry, smart textiles or smart/linked medical applications. The MicroRTD is highly accurate (±0.1°C) and its small thermal mass ensures very fast and precise temperature measurement. It offers high levels of precision, long-term stability and fast response times whilst operating over a wide temperature range of -40°C to +150°C.
www.atcsemitec.co.uk
www.electronicsworld.co.uk July/August 2021 53
Amphenol Industrial Operations, a global leader in interconnect systems, now offers EMI Wind-Lok, a reverse bayonet connector designed to deliver high power from source to load. This heavy-duty connector with EMI shielding is used in a variety of different markets, including wind turbines, offshore windfarms, electrical generators, charging systems, as well as offshore petroleum production. Wind-Lok has a shell size of 40, this heavy-duty connector can fits a wide range of wire sizes. Its 18
mm RADSOK socket contact provides an amperage rating up to 800 A at 2,500 VDC. EMI Wind-Lok features rugged corrosion resistant plating with a hard coat anodized finish that can withstand 300 days of continuous salt spray. The connector offers crimp or two-hole busbar termination and features silver plated contacts. It is RoHS and REACH compliant, providing more protection for insert and contact assembly. The connector is also vibration resistant. For more information, please visit:
www.amphenol-industrial.com
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