Maximum iso packet size, Ded chapter, Adapter in chapter – ALLIED Vision Technologies Pike F-1600 User Manual
Page 355: Chapter
Configuration of the camera
PIKE Technical Manual V5.1.2
355
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 iso-
chronous packet up to 11.000 byte at S800. Thus the isochronous bandwidth is
increased from 64 MByte/s to approximately 84 MByte/s. You need either PCI
Express.
The Maximum ISO packet size feature ...
•
... reduces the asynchronous bandwidth available for controlling cameras
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 176: Advanced register: Maximum ISO packet size
Note
We strongly recommend to use PCI Express adapter.