Differences between revisions 2 and 3
Revision 2 as of 2011-02-17 20:46:58
Size: 1114
Editor: HectorOron
Comment:
Revision 3 as of 2011-03-26 23:20:09
Size: 1514
Editor: ?AlexAlex
Comment:
Deletions are marked like this. Additions are marked like this.
Line 37: Line 37:

== Design of the system==

{{attachment:schematic-of-the-box.eps}}

=== Scheduler===
The part which take the signal from the plug and divided it to the different part.
Maybe it is useful to use a transformer to isolate the electric system.

=== Signal reception===

It is a filter which need to have a good bandwidth and a frequency controlled by the processor

===Broadcast signal===

Hardware Requirements

/!\ INF: Please help extending the information in this page

The hardware must/should/may ...

Non-functional requirements

  • It must have at least one serial interface
  • It should have at least one JTAG interface
  • It must have at least one network interface
  • Noise level must be below 20 dB
  • It should have over 256MB RAM
  • It should have over 512MB Flash for filesystem
  • It must have storage interfaces, at least one of them:
    • SATA interface
    • USB interface
    • SD/MMC interface

Performance requirements

  • It must be able to execute all Freedom Box software at less than half of the CPU load

Power requirements

  • It should not consume over 15W at full CPU load

Physical requirements

  • It should be reduced in size, not bigger than a set-top box.

Environmental requirements

  • It must work perfectly between 0-40ºC

INF: At the first version we do not need to be too ambitious, rugged and harsh environment as well as renewal energy powered devices are desired but not at this point

== Design of the system==

schematic-of-the-box.eps

=== Scheduler=== The part which take the signal from the plug and divided it to the different part. Maybe it is useful to use a transformer to isolate the electric system.

=== Signal reception===

It is a filter which need to have a good bandwidth and a frequency controlled by the processor

===Broadcast signal===