Maximum iso packet size, Chapter – ALLIED Vision Technologies Stingray F-504 User Manual
Page 324
Configuration of the camera
STINGRAY Technical Manual V4.4.4
322
Maximum ISO packet size
Use this feature to increase the MaxBytePerPacket value of Format_7 modes.
This overrides the maximum allowed isochronous packet size specified by
IIDC V1.31.
Example
For isochronous packets at a speed of S800 the maximum allowed packet size
(IIDC V1.31) is 8192 byte. This feature allows you to extend the size of an
isochronous packet up to 11.000 byte at S800. Thus the isochronous band-
width is increased from 64 MByte/s to approximately 84 MByte/s. You need
either PCI Express or PCI-X (64 bit).
The Maximum ISO packet size feature ...
•
... reduces the asynchronous bandwidth available for controlling cam-
eras by approximately 75%
•
... may lead to slower responses on commands
•
... is not covered by the IEEE1394 specification
•
... may not work with all available 1394 host adapters.
Register
Name
Field
Bit
Description
0xF1000560
ISOSIZE_S400
Presence_Inq
[0]
Indicates presence of this feature
(read only)
---
[1..5]
Reserved
ON_OFF
[6]
Enable/Disable S400 settings
Set2Max
[7]
Set to maximum supported packet
size
---
[8..15]
Reserved
MaxIsoSize
[16..31]
Maximum ISO packet size for S400
0xF1000564
ISOSIZE_S800
Presence_Inq
[0]
Indicates presence of this feature
(read only)
---
[1..5]
Reserved
ON_OFF
[6]
Enable/Disable S800 settings
Set2Max
[7]
Set to maximum supported packet
size
---
[8..15]
Reserved
MaxIsoSize
[16..31]
Maximum ISO packet size for S800
Table 152: Advanced register: Maximum ISO packet size
Note
We strongly recommend to use PCI-X (64 bit) or PCI
Express adapter.