linux-chenxing.org
Miyoo Mini
Specs
- SigmaStar SSD202D
- 640x480 MIPI LCD panel (LMS279CC01)
- SPI NOR flash?
- Vibration motor?
- waa2890 or equivalent audio amp
- TP4056 lipo charger clone? (chip marked 4051)
- PT4103 backlight driver - http://www.micro-bridge.com/data/CRpowtech/PT4103E.pdf
- ALPU-FA(?) security chip
PCB photos
Notes
- Charger detect is gpio-59
- The power control is a bit weird, a gpio controls if the battery is connected to the system. Pressing the power button overrides the control. You need to hold the power button long enough that the kernel starts booting and toggles the gpio to force the battery on. The system is always powered up if the power is connected via usb.
Discussion threads
- https://github.com/linux-chenxing/linux-chenxing.org/discussions/41#discussioncomment-1824211
Youtube Videos
- https://www.youtube.com/watch?v=lIYXE1-OPDI&ab_channel=AlwaysBeFun
- https://www.youtube.com/watch?v=SNcezdyFg1Y&t=1s&ab_channel=AlwaysBeFun
- https://www.youtube.com/watch?v=d7GXZ2wpA9U&ab_channel=TakiUdon
Other wikis
Where to buy
display re notes
- pixel sc clock source is undocumented, 0x38
- original bootcmd
bootcmd=gpio output 85 1; bootlogo 0 0 0 0 0; gpio output 4 1; mw 1f001cc0 11; gpio out 8 0; sf probe 0;sf read 0x22000000 ${sf_kernel_start} ${sf_kernel_size}; gpio out 8 1; bootm 0x22000000