RST pin on Omega2
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I cannot find any documentation on the RST pin on Omega2 module.
Does anyone know what it do and how can it be used?Kjell S.
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I found some documentation about this pin in the data sheet for the AR9331.
--- quote---
7.5 Power On Sequence
The AR9331 has an internal power on circuit
reset. when all power inputs, including
VDD33, VDD12 and VDD25, are ready, the
RESET_L signal; will be released from low to
high. This signal is connected to a digital
counter which controls the digital reset and is
released after 5 μs. When the digital reset goes
from low to high, the CPU begins fetching
instructions from the internal ROM or the
external SPI in order to boot the system.
--- end quote ----If I understand this correct this is an output that can be used to hold external chips in reset until power is good and CPU starts.
Kjell S.
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The Omega2 uses an MT7688. The AR9331 was used in the now discontinued original Omega.
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Anyone got an answer?
What is the difference between the two reset pins?
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@Paul-Chidley Onion Omega2
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RST pin is an active Low input for hardware reset
The datasheet of Omega2’s SoC can be found here: Mediatek MT7688 Datasheet -
FW RST pin is an active High input for software reset
See also in the official Onion Omega2 Documentation Onion Omega2
See also RESET BUTTON in descriptions of various Onion's Docks.
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