Stk-l21 Isp Pinout Guide

Technically yes for reading/writing, but without proper voltage level shifting (1.8V), you will destroy the eMMC. A dedicated ISP box is strongly recommended.

ISP (In-System Programming) is a method of communicating directly with the eMMC (embedded MultiMediaCard) flash memory chip on a phone’s motherboard. This method bypasses the primary processor (CPU) and allows specialized tools to read, write, or erase partitions directly. stk-l21 isp pinout

You will need the STK-L21 ISP Pinout if: Working with ISP pinouts carries risk

Working with ISP pinouts carries risk. One wrong move can permanently kill the motherboard. Please observe these safety rules: Technically yes for reading/writing