Fairphone 3 notes
SoC and main board
The Fairphone uses the Qualcomm Snapdragon 632 Mobile Platform. Not much documentation is available to the public, the best available from the vendor is a product brief. According to Wikipedia, these are "pin and software compatible with 625, 626 and 450". A few more details can be found about the older Snapdragon 626. Wikichip has a few more details
Alongside a Samsung multi chip package (MCP) lovingly named KMRH60014A-B614, providing 4 GiB of LP3DDR volatile memory combined with 64 GiB NAND with an eMMC 5.1 interface.
Test Points And Pinout
The following are measures and probes done against an unpowered, turned off but battery plugged, or a powered device. Running without any display or other peripherals.
The labels are arbitrarily assigned, just as a reference. Measures and reasoning or net assignment are educated guesses, at the very best. Do not rely on any of this data.
label | connected to | bat plugged | power on | comment |
---|---|---|---|---|
A | BAT 4 | 0V | 0V | GND |
B | BAT 4 | 0V | 0V | GND |
C | ||||
D | ||||
E | ||||
F | BTN 4 | 0V | 0V | power button |
G | BAT 1 | 4.2V | 4.2V | |
H | BAT 1 | 4.2V | 4.2V | |
I | 0V | 1.32 - 1.36V | (takes a few seconds to rise after power on) | |
K | 0V | 0V | EDL | |
L | 0V | 1.78V | EDL | |
N | FP 4 | 0V | ||
O | FP 9 | 0V | ||
P | FP 3 | 0V | ||
Q | FP 2 | 0V | ||
BTN 1 | 0V | 0V | volume down button | |
BTN 2 | 0V | 0V | volume up button | |
BTN 3 | 1.78V | 1.78V |
label | connected to | bat plugged | power on | comment |
---|---|---|---|---|
R | 0V | 0V | GND | |
S | 0V | 0V | UART RX (?) | |
T | 0V | 1.78V | UART TX | |
W | 0V | 0V | GND |
Similar devices
Other Android devices that use the same Qualcomm platform (non of which has a LineageOS port so far, it seems):
- Asus Zenfone Max M2 ZB633KL
- Honor 8C
- Zeizu Note 8
- Motorola Moto G7
- Motorola Moto G7 Play
- Motorola Moto G7 Power
- Xiaomi Redmi 7
- Xiaomi Redmi Note 4
- Lenovo K10 Plus
Links and references
The iFixIt teardown provided lots of details about the internals and served as a good starting point.