This is an old revision of the document!

Difference between CoBo 1.0v and CoBo 0.2v

Rocket IO GTX Transceiver improvements
- Bank 12, 15, and 22 are no longer used
- Re-routed signals away from MGT VCC/GND
Mutant WSCA/SYNC signal is now on a CC pin
Improved board power and power management
- VCCINT now uses a 10A switching regulator instead of a 16A
- Input capacitance now conforms with MicroTCA requirement. i.e. it doesn't exceed 800uF.
  - (C113) and (C122) are now 220uF instead of 330uF
- Improved Power up sequence
  - No longer uses an additional (U35) chip (TPS3808G09DBVR)
  - Power-up sequence used to be VCCINT → VCC3V3 & VCC5V0. Now it is VCC5V0 → VCC3V3 → VCCINT
    - This reduces the race condition when BPI booting from flash