Summary of u8plus smart watch quick teardown and uart
Summary: A budget U8 Plus smartwatch teardown reveals a MediaTek MT6261 SoC, 200mAh 3.7V battery, speaker, reset button, vibrator motor connection, touchscreen with its controller on the flex cable, and exposed pads including UART (RXD/TXD), USB signals (D+/D-), VBAT, PWR, and unlabelled pads possibly for JTAG.
Parts used in the U8 Plus smart watch teardown:
- Aluminium back plate
- 200mAh 3.7V battery
- Speaker
- Reset button (mounted near USB connector)
- MediaTek MT6261 SoC
- Touchscreen and touchscreen controller on flat flex cable
- Home/power button
- Vibrator motor (connection labeled VIB)
- USB connector and USB data pads (D+ and D-)
- Bluetooth antenna
- LCD and LCD connector pads
- RXD and TXD UART pads
- VBAT and PWR pads
- Unlabelled test pads (possible JTAG)
With the battery and the speaker pulled back we can see a MediaTek MT6261 SoC and supporting components on the left. On the right are connections for the reset button (mounted on top of the usb connector), speaker and what I assume is a vibrator motor connected to ‘VIB’. The touchscreen is also connected at the top, with it’s controller mounted on the flat flex cable. The home/power button is tucked in on the far left. u8plus smart watch quick teardown and uart 9 Jan 2016
The ‘D+’ and ‘D-‘ and the proximity to the USB suggest the four pads on the left are for the USB; VBAT is positive side of the battery; PWR connects to the power/home button. Just slightly covered by the green label is RXD and TXD – which is likely our UART, and two others (‘OW2’ and ‘OL0’). Above them next to PWR are five unlabelled pads – hopefully these are JTAG.
For more detail: u8plus smart watch quick teardown and uart
- What SoC does the U8 Plus use?
The article identifies a MediaTek MT6261 SoC. - What is the battery specification?
The battery is 200mAh at 3.7V. - Where is the reset button located?
The reset button is mounted on top of the USB connector on the right side. - Does the watch have UART pins exposed?
Yes; RXD and TXD pads are visible and likely the UART. - Are USB data signals accessible on the board?
Yes; four pads near the USB are suggested to include D+ and D- for USB. - Is there a vibrator motor connection?
Yes; a connection labeled VIB is present and assumed to be for a vibrator motor. - Where is the touchscreen controller located?
The touchscreen controller is mounted on the flat flex cable at the top. - Are there unlabelled pads that could be JTAG?
Yes; five unlabelled pads next to PWR are hoped to be JTAG.
