Allied Vision Technologies Pike Manual de Instruções Página 26

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 332
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 25
FireWire
PIKE Technical Manual V4.0.0
26
Image transfer via 1394a and 1394b
Technical detail 1394a 1394b
Transmission mode Half duplex (both pairs needed)
400 Mbit/s data rate
aka: a-mode, data/strobe (D/S)
mode, legacy mode
Full duplex (one pair needed)
1 Gbit/s signaling rate, 800
Mbit/s data rate
10b/8b coding (Ethernet), aka:
b-mode (beta mode)
Devices Up to 63 devices per network
Number of cameras Up to 16 cameras per network
Number of DMAs 4 to 8 DMAs (parallel) cameras / bus
Real time capability Image has real time priority
Available bandwidth acc. IIDC
(per cycle 125 µs)
4096 bytes per cycle
~ 1000q @ 400 Mbit/s
8192 bytes per cycle
~ 2000q @ 800 Mbit/s
(@1 GHz clock rate)
For further detail read Chapter Frame rates on page 216.
Max. image bandwidth 31.25 MByte/s 62.5 MByte/s
Max. total bandwidth ~45 MByte/s ~85 MByte/s
Number of busses Multiple busses per PC
limit: PCI bus
Multiple busses per PC
limit: PCI (Express) bus
CPU load Almost none for DMA image transfer
Gaps Gaps negatively affect asynchro-
nous performance of widespread
network (round trip delay),
reducing efficiency
No gaps needed, BOSS mode for
parallel arbitration
Table 5: Technical detail comparison: 1394a and 1394b
Note
L
The bandwidth values refer to the fact:
1 MByte = 1024 kByte
Vista de página 25
1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 331 332

Comentários a estes Manuais

Sem comentários