Hi all,
I have a board designed around the STM32MP153FAD (TFBGA257, 10×10 mm, 0.5/0.65 mm pitch, 257 balls). Since the MP153 does not include a DSI controller or GPU, I did not connect any DSI-related power pins or signals. Due to stock shortages, I am now considering switching to the STM32MP157FAD, which shares the same TFBGA257 footprint.
My question is: can the STM32MP157FAD be used on this board without connecting the DSI-specific power rails?
The DSI power pins that exist on the MP157 but were not populated on my design are:
- VDD_DSI — DSI I/O supply
- VDD1V2_DSI_REG — output of internal 1.2 V DSI regulator
- VDD1V2_DSI_PHY — 1.2 V supply for DSI PHY
- VDDA1V8_DSI — 1.8 V analog supply for DSI
My concern is whether the MP157 will operate correctly (for non-DSI use cases) if these pins receive no supply. (Unused pins are floating right now, is that correct or should I connect it to GND)
I have attached my current schematic for reference.
Any guidance would be appreciated.
Best regards
Regards
