Atmel AT7910E Instrukcja Użytkownika Pobierz pdf (Strona 4)

AT7910E [DATASHEET]

7796G AERO 02/13

1. Functional Description

The SpaceWire router comprises the following functional logic blocks:

Eight SpaceWire bi-directional serial ports.

Two external parallel input/output ports each comprising an input FIFO and an output FIFO.

A non-blocking crossbar switch connecting any input port to any output port.

An internal configuration port accessible via the crossbar switch from the external parallel input/output port or the

SpaceWire input/output ports.

A routing table accessible via the configuration port which holds the logical address to output port mapping.

Control logic to control the operation of the switch, performing arbitration and group adaptive routing.

Control registers than can be written and read by the configuration port and which hold control information e.g. link

operating speed.

An external time-code interface comprising tick_in, tick_out and current tick count value

Internal status/error registers accessible via the configuration port

External status/error signals

A block diagram of the routing switch is given in the following figure:

Figure 1. SpaceWire Router Block Diagram

1 2 3 4 5 6 7 8 9 ... 20 21

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Atmel AT7910E Instrukcja Użytkownika Strona 4