project:hgg:hardwaredoc:friendship
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende Überarbeitung | ||
| project:hgg:hardwaredoc:friendship [2012-05-17 19:34] – 93.231.180.130 | project:hgg:hardwaredoc:friendship [2012-05-17 19:36] (aktuell) – [Design decissions] 93.231.180.130 | ||
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| Zeile 11: | Zeile 11: | ||
| The connectors used for the module cards are physically (but not electrically) PCI-Express x4 Slots. Those are reasonably cheap and generally available at electronic shops. | The connectors used for the module cards are physically (but not electrically) PCI-Express x4 Slots. Those are reasonably cheap and generally available at electronic shops. | ||
| - | One of the ports is special, it is the port for the busmaster. The busmaster controls the stuff that happens on the bus and is also controlling the bus protocol. The busmaster port has an additional set of pins at the front of the PCIe slot. Thus not more than 1 busmaster can be present on the bus. | + | One of the ports is special, it is the port for the busmaster. The busmaster controls the stuff that happens on the bus and is also controlling the bus protocol. The busmaster port has an additional set of pins at the front of the PCIe slot. Thus not more than 1 busmaster can be present on the bus. Please refer for a busmaster port extension at the bottom of this document. |
| Only few things should happen on the backplane board. It is mainly a bus system and nothing more. So there' | Only few things should happen on the backplane board. It is mainly a bus system and nothing more. So there' | ||
| Zeile 30: | Zeile 30: | ||
| * /CS ... this card is selected to perform a bus transmission (active low) | * /CS ... this card is selected to perform a bus transmission (active low) | ||
| * PRSNT2 ... Connect to PRSNT1 to indicate that the card is present | * PRSNT2 ... Connect to PRSNT1 to indicate that the card is present | ||
| - | |||
| - | The card port for the busmaster has an additional part for getting information about stuff going on the bus like interrupt handling, card present-status and so on. This port is available only on port 0 which is therefore not useable for anything but the busmaster. The busmaster port's current layout is this: | ||
| - | |||
| - | {{: | ||
| - | |||
| ===== POWER ===== | ===== POWER ===== | ||
| Zeile 67: | Zeile 62: | ||
| + | ====== Extension for the Busmaster Card ====== | ||
| + | |||
| + | The card port for the busmaster has an additional part for getting information about stuff going on the bus like interrupt handling, card present-status and so on. This port is available only on port 0 which is therefore not useable for anything but the busmaster. The busmaster port's current layout is this: | ||
| + | |||
| + | {{: | ||
project/hgg/hardwaredoc/friendship.1337276046.txt.gz · Zuletzt geändert: 2012-05-17 19:34 von 93.231.180.130