August 16, 2011
C C++ Others
The A20 has a RTC that uses a 30 bit counter to count elapsed time in YY-MM-DD and HH-MM-SS. It continues to operate via battery backup when the system is powered off. The RTC has an independent power pin (RTCVDD)(A20-Pin K8) which is connected to the AXP209 PMU(pin 28) on the pcDuino3. In the power-down mode this pin should continue to have power if a battery is connected to J7. (I have not verified that the PMU is programmed as such, but the capability is there).
According to the Allwinner A20 User manual..
“Support SATA 1.5Gbs and SATA 3.0Gb/s”
“Comply with SATA spec 2.6”
No public wish lists :(
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