SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.


Member Since: August 16, 2011

Country: United States



Systems Engineer

Programming Languages

C C++ Others


Systems Performance

  • 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.. LINK: http://dl.linux-sunxi.org/A20/A20%20User%20Manual%202013-03-22.pdf “Support SATA 1.5Gbs and SATA 3.0Gb/s” “Comply with SATA spec 2.6”

No public wish lists :(