Note: Because manufacturers change PCB layouts, always verify using a multimeter in continuity mode—one point should have 0Ω to ground, the other should have high resistance to ground.
| Condition | Voltage (TP to GND) | Impedance | |-----------|---------------------|------------| | Device off, no short | 1.8V (pull-up enabled) | 220kΩ | | Short applied (TP→GND) | 0V | ~0.5Ω | | BROM active | Toggles 1.8V/0V pattern | N/A | Nokia Ta-1468 Test Point
In these scenarios, the forces the CPU to bypass the normal boot sequence and enter Download Mode (Unisoc’s equivalent of Qualcomm’s EDL). Once in this mode, specialized tools like ResearchDownload , SPD Upgrade Tool , or UniFlash can communicate with the phone even when it appears dead. Use a pair of metal tweezers to bridge
Use a pair of metal tweezers to bridge the test point pad to a metal shield (ground). Note: Because manufacturers change PCB layouts
