User`s manual

VLSI
Solution
y
HH
VS1000+1003 VoIP Speaker Phone VSMPG
8. DOCUMENT VERSION HISTORY
2008-05-06 Version 2.02
• Changed layout schematics from version 1.5 to 1.6. They can be found in the same
package as this documentation, under directory LayoutSchemaV16/. For details,
see Chapter 7.2.
• Firmware has not been updated since 2.00. There is no need to reload it.
2008-05-05 Version 2.01
• Changed value for capacitor C22 from 10 to 1 µF in schematics Figure 7.2, Page 25.
This was done because power-off wouldn’t otherwise work properly.
• Firmware has not been updated since 2.00. There is no need to reload it.
2008-04-25 Version 2.00
• Added all missing features, including conversation and voice recording, and pause
functionality.
• Added lots of safety code to allow hot hot-swapping memory cards.
• Reliability enhanced.
• Changed document name to “VoIP Speaker Phone”.
2008-03-20 Version 1.20
• Sound pressure of Far End Signal improved.
• Cross-talk handled better.
• Ogg Vorbis skipping bug fixed.
• Package now includes board layout files.
• Occasional VoIP audio crackling fixed.
• Schematics updated.
• Created Chapter 7.2 for layout files.
2008-02-28 Version 1.10
• Added schematics.
• New features.
2008-02-22 Version 1.00
• First release.
Rev. 2.12
2008-09-18
Page 28(30)