Rev 7 (release for DEM)
--------------------------
- added Si570 programmable oscillator to drive GBTCLK0 line
- changed eSATA connector J2 to ordinary SATA socket
- inverted polarity of XPT_I6 input (to ease the routing)
- replaced power LEDs with DEM components
- increased R14 to 5.1k (less current load on TL431)
- PCB: added licence notice, removed CERN logo

Rev 8 (fixed DEM issues)
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- updated IC11, IC7, IC8 to use exact CERN components
- reversed polarity of Si570 clock output to ease PCB routing
- PCB: fixed silkscreens (lables were mirrored)
- PCB: fixed diff pairs crossing power planes on Top layer
- PCB: changed stackup to DEM default (0.2 mm prepreg/1.0 core/0.2 prepreg)
- PCB: rerouted diff pairs to match new impedance rules
- PCB: increased via hole diameter to 12 mils

Rev 9 (final version for DEM)
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- PCB: minor cleanliness bugfixes
- SCH: updated table with correct voltage measurements
- SCH: removed C53 (was causing problems with TL431)
- added copyright notices
