[Documentation] AtomS3 Schematics
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AtomS3 things that would be nice to know...
- Can the MPU6886 be powered down?
- Does the SY8089 power everything? (if not, is the EN pin connected to GPIO?)
- OLED uses GC9107, can it be powered down? (to prevent parasitic current)
- AtomS3 also has an internal WS2812 LED, is it connected? can it be powered off? (to prevent parasitic current)
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@kinonsc You might prefer a Stamps3!
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MPU6886 runs at 3.3v, it has a sleep mode at 0x6B (R/W) bit 6 (mask 0x40). 1 for sleep, 0 for awake (not sure if it changes any other "power management" bits, check the manual sections 4.18, 8.38, 8.39, and experiment by checking 0x6B & 0x6C, putting to sleep and rechecking). It pulls only 6 µA while sleeping, though probably still listens on I2C. If your intent was to remove it's address from I2C, according to FCC docs, it looks like it might be the daughter board inside that can be disconnected.
ESP32-S3 runs at 3.3v, so it's powered by the SY8089, SY8089 pulls 55 µA quiescent.
OLED can be put into sleep mode, check M5Unified M5.Display.sleep() & M5.Display.wakeup(), backlight can be turned off via GPIO16
WS2812 uses 5v bus power on the Atom Lite, probably the same on the AtomS3's, 1 mA quiescent, cut the trace if you don't want it.
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@saiyande Are you referering to the AtomS3?
https://docs.m5stack.com/en/core/AtomS3
It does not have an OLED or WS2812! -
@teastain
Yep, AtomS3.I didn't double check if it was OLED, LCD, etc, I just used the term from @Kinonsc
Hm, yep, M5Stack doesn't mention a WS2812 in store or docs, oddly, their FCC doc lists it... https://fccid.io/2AN3WM5ATOMS3/User-Manual/User-Manual-6228015.pdf
and it does look like there is one under the (?MPU6886?) daughterboard: https://fccid.io/2AN3WM5ATOMS3/Internal-Photos/Internal-Photos-6228008Mine hasn't arrived yet, so I only have docs for reference atm.
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@Kinonsc , It appears a schematic and block diagram exists (listed in FCC docs), just not public (It's up to M5Stack what they choose to make public, cuts down on clones).
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@saiyande I have one, they are GREAT !
-cheers -
@saiyande said in [Documentation] AtomS3 Schematics:
Hm, yep, M5Stack doesn't mention a WS2812 in store or docs, oddly, their FCC doc lists it... https://fccid.io/2AN3WM5ATOMS3/User-Manual/User-Manual-6228015.pdf
and it does look like there is one under the (?MPU6886?) daughterboard: https://fccid.io/2AN3WM5ATOMS3/Internal-Photos/Internal-Photos-6228008Mine hasn't arrived yet, so I only have docs for reference atm.
I received and took apart my AtomS3 (to remove the MPU6886), there are pads for a WS2812, but it isn't populated.
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@saiyande I would hazard a guess that its because the same PCBis used for the AtomS3 and the AtomS3lite version.
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I was looking for this as well…
Any idea if M5Stack still looks at the forums specifically feature suggestions? I don't see anything from them recently. @ajb2k3 , I'm guessing your a mod here? -
@ifantus Yeh, I'm the Mod of the communities.
They do visit the forums but they have been busy with travel.
