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glossary:glossary_h [2019/09/05 19:14]
tgerbic added text for Hexadecimal or Hex entry
glossary:glossary_h [2019/10/09 11:10]
Bob Vetterlein [Handshaking]
Line 19: Line 19:
 In information technology, telecommunications,​ and related fields, handshaking is an automated process of negotiation that dynamically sets parameters of a communications channel established between two entities before normal communication over the channel begins. It follows the physical establishment of the channel and precedes normal information transfer. In information technology, telecommunications,​ and related fields, handshaking is an automated process of negotiation that dynamically sets parameters of a communications channel established between two entities before normal communication over the channel begins. It follows the physical establishment of the channel and precedes normal information transfer.
  
 +===== Happening =====
 +A term devised, and introduced in the documentation for Universal CANMIO, for an event that is internal to the module to distinguish it from an external event (on the bus).
 +For instance, say input 1 changes from high to low, in early modules of the CBUS range this would simply produce an ON event with EN (Event Number) of 1, in the Universal code for the CANMIO it produces a '​Happening'​ with a value that indicates input 1 ON. Through the configuration process this may be mapped to produce that same event or something entirely different.
 ===== HASL ===== ===== HASL =====
 [[https://​en.wikipedia.org/​wiki/​Hot_air_solder_leveling|Hot Air Solder Leveling]]\\ HASL = hot air solder levelling - the bare copper of the etched PCB would soon oxidise and refuse to take solder, so a thin layer of "​something"​ is added to make the shelf life longer. The standard HASL provided by Chinese manufacturers is leaded solder. More expensive options are lead free solder, organic solderable varnish stuff, nickel, or gold flash. [[https://​en.wikipedia.org/​wiki/​Hot_air_solder_leveling|Hot Air Solder Leveling]]\\ HASL = hot air solder levelling - the bare copper of the etched PCB would soon oxidise and refuse to take solder, so a thin layer of "​something"​ is added to make the shelf life longer. The standard HASL provided by Chinese manufacturers is leaded solder. More expensive options are lead free solder, organic solderable varnish stuff, nickel, or gold flash.
glossary/glossary_h.txt ยท Last modified: 2019/11/12 01:47 by Bob Vetterlein