BS EN 16603-50-12:2020 pdf free.Space engineering一SpaceWire 一Links,nodes, routers and networks.
BS EN 16603-50-12 If the driver has one 0V for signals such as TTL or CMOS, and a separate 0V for the differential inputs, the receiver ground is the 0V for the differential inputs. The receiver ground is a plane Or planes which provide controlled impedance for the receiver’s differential pairs.The term “router” is used because of the heritage of SpaceWire which is based on IEEE1355-1995 which is in turn based on earlier work on Transputer technology. This work predated the Internet and the use of the term “router”to mean a device that determines the
route to a destination as opposed to a“switch” that switches a packet to an output port based on an address. In SpaceWire the term “router” is used to mean a routing switch. This is widely
understood terminology in the SpaceWire community.switch matrix connected to one or more SpaceWire ports, a configuration port and a local broadcast code register, which optionally broadcasts broadcast codes and which switches packets from one port to one or more other ports where the destination address of each packet is used by the routing switch to determine which port the packet is forwarded through.The two signals making up a differential pair are given the suffixes + and – to indicate the positive and negative components of the differential signal, respectively. The SpaceWire differential signals are referred to as D+, D- and S+, S- for Data and Strobe, respectively. When considering the driven end of a SpaceWire link,
these signals are designated Dout+, Dout- and Sout+, Sout- for Data and Strobe, respectively. Similarly, the signals at the input end of a SpaceWire link are Din+, Din- and Sin+, Sin-.State diagrams are used to represent the behaviour of several parts of the SpaceWire protocol. All state diagrams in this Standard use the style shown in Figure 3-3. States are represented by ellipses with the state name written inside the ellipse in bold. Actions to take while in a particular state are written in italics inside the ellipse underneath the state name. Transitions from one state to another are indicated by arrows. The event that causes a transition is written alongside the arrow. Unconditional transitions are indicated by arrows without an event name written next to it. Reset conditions are indicated by transition arrows that start in empty space.BS EN 16603-50-12 pdf download.