ISP soldering requires high precision, a microscope, and professional soldering gear to avoid permanently damaging the motherboard. Vivo Y33s PD2147 Test Point and ISP Pinout New 2033
Here is the pinout as seen from the , with the pin 1 indicator (usually a square pad or a small triangle): y33s isp pinout
, you must identify four primary data lines on the motherboard: ISP soldering requires high precision, a microscope, and
If you need to force programming mode (e.g., Allwinner FEL): ISP soldering requires high precision
Some versions of the Y33S remap the ISP header to JTAG instead of UART. If you find 5 pins (GND, TCK, TMS, TDI, TDO), use OpenOCD with a configuration like: