Products Cliff MTP® FeedThrough Fibre-Optic Connector
Secure through-panel connection for high-speed data transfer The MTP®
/MTO (multi-fibre push on)
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:
London, DATE Panduit has launched its Adjustable Depth 4 Post Rack, designed
to support network equipment in data centre and telecommunication environments. The rack combines the stability of a cabinet with the accessibility of an open rack to provide the user with maximum flexibility when designing the network layout. Upgrading active equipment in telecommunication rooms and data centres often requires a deeper rack than standard supplied units, which the Panduit 4 Post Rack system provides.
www.panduit.com 40 October 2021
www.electronicsworld.co.uk
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.
Cable Assemblies
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
• 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
Panduit Launches Adjustable Depth 4 Post Rack • Strength and flexibility in a multiple depth rack for wide range of network requirements
• Rack versatility offers the capability to extend to provide almost 80% capacity increase • Available as 45RU or 52RU and capable of accepting 19” EIA equipment
FT connector, is the latest addition to Cliff’s market leading FeedThrough connector range and allows fast and reliable through-panel connection of standard 12-72 multimode optical fibre cables. To ensure reliable connectivity the connector body is made from black nickel-plated die-cast metal and the insert made from ABS/PC rated toUL94-VO and features a restraining clamp for secure cable connection. For system
security a dust cover is available for when the connector is not in use. Cliff’s wide range of FeedThrough connectors may be used in audio/broadcast and industrial applications and are mounted in standard XLR cut-outs. Pre-assembled 19" patch panels with up to 16 connectors mounted are available to order.
www.cliffuk.co.uk
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